Find Cheap Flights from Seattle/Tacoma Intl to London Gatwick (SEA - LGW)

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Thu 23/11
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Good to Know

Low Season:
October
Best time to beat the crowds
4%
expected price decrease
High Season:
July
Most popular time to fly
25%
expected price increase
Average price:
C$ 1350
(avg. price over the last 2 weeks)
Good Deal:
C$ 595
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to London Gatwick

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for C$ 594 or less.
The cheapest flight from Seattle/Tacoma Intl to London Gatwick was found, on average, 47 days before departure.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be June, July and August. The cheapest month to fly is October.
Morning departure is around 49% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Seattle/Tacoma Intl to London Gatwick Flights

How long does a flight from Seattle/Tacoma Intl to London Gatwick take?
An average nonstop flight takes 11h 15m, covering a distance of 7741 km.
How many flights are there between Seattle/Tacoma Intl and London Gatwick?
There are 4 (nonstop) flights between Seattle/Tacoma Intl and London Gatwick per week, averaging 0 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to London Gatwick?
In the past 3 days, the cheapest round-trip tickets were found on Icelandair (C$ 507) and Multiple Airlines (C$ 728)
Do I need a passport to fly between Seattle/Tacoma Intl and London Gatwick?
Yes.
Which airlines fly most frequently between Seattle/Tacoma Intl and London Gatwick?
Norwegian (0 times daily) are the most frequent flyers on this route.
Flexible dates? Here are the best airfares found in the past 48 hours

Book cheap flights from Seattle/Tacoma Intl to London Gatwick (round-trip)

Airports
Origin
Seattle
C$ 507
only
C$ 507
Destination
London
C$ 507
only
C$ 507
Tue, 3 Apr
SEA
LGW
11h 15m
Wed, 18 Apr
LGW
SEA
12h 50m
C$ 507
Trip: 16 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
BRU
KEF
Good 6.0

Second time I have flown to Brussels with Iceland Air. I love their customer service and especially the flight route. My flight going over was cancelled due to weather. I called their reservation office , had to wait on hold for 1 hour and 15 minutes , but it was worth it. The reservation agent found me a new flight on LH, she explained I would get a conformation about 3 hours after our conversation with the flight information and new txt information. I was able to check in with LH on line that evening. Iceland Air had every pre assigned seats for me.

The boarding process in Kevlavik is pretty awful. No seating around gate areas. You have to stand in line for about 30 minutes to then have to get on shuttle to be driven to plane where you have to walk on stairs to get to plane, or in some cases you actually get to board from the terminal, which happened yesterday. I have MS,and sometimes standing for long periods of time and then having to climb up stairs is difficult for me. I also see a lot of elderly people and parents with babies having difficulty with this boarding process. Their airport really needs major expansion for the amount of people that travel thru their. Seating araes around their gates should be a priority.

YEG
KEF
Good 7.0

I liked the northern light atmosphere lights and the individual entertainment option.

My economy seat was a bit snug for an average built Person. I am used to being offered some kind of snack, but there is a menu with food and drinks you can choose from for a fee.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

KEF
SEA
Good 6.0

The entertainment portion was the biggest positive. Crew was pleasant and non invasive.

Not offering any sort of complimentary food on a 7 hour flight isn't ok. Not being transparent about not offering any sort of food is worse. Boarding was confusing with separate lines, scanning our tickets, herding us into a room, then directing us to go upstairs, then over a ramp, then into our plane without any sort of efficient zone boarding.

Thu, 25 Jan
SEA
LGW
20h 50m
Sun, 11 Feb
LGW
SEA
9h 55m
C$ 728
Trip: 18 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 3 Apr
SEA
LGW
11h 15m
Fri, 20 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 18 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

Tue, 10 Apr
SEA
LGW
11h 15m
Sun, 29 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 20 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
SEA
Good 6.0

The entertainment portion was the biggest positive. Crew was pleasant and non invasive.

Not offering any sort of complimentary food on a 7 hour flight isn't ok. Not being transparent about not offering any sort of food is worse. Boarding was confusing with separate lines, scanning our tickets, herding us into a room, then directing us to go upstairs, then over a ramp, then into our plane without any sort of efficient zone boarding.

BRU
KEF
Good 6.0

Second time I have flown to Brussels with Iceland Air. I love their customer service and especially the flight route. My flight going over was cancelled due to weather. I called their reservation office , had to wait on hold for 1 hour and 15 minutes , but it was worth it. The reservation agent found me a new flight on LH, she explained I would get a conformation about 3 hours after our conversation with the flight information and new txt information. I was able to check in with LH on line that evening. Iceland Air had every pre assigned seats for me.

The boarding process in Kevlavik is pretty awful. No seating around gate areas. You have to stand in line for about 30 minutes to then have to get on shuttle to be driven to plane where you have to walk on stairs to get to plane, or in some cases you actually get to board from the terminal, which happened yesterday. I have MS,and sometimes standing for long periods of time and then having to climb up stairs is difficult for me. I also see a lot of elderly people and parents with babies having difficulty with this boarding process. Their airport really needs major expansion for the amount of people that travel thru their. Seating araes around their gates should be a priority.

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

KEF
SEA
Mediocre 3.3

Entertainment system appeared to be average, although I didn't use it.

Terrible legroom. Expensive meals and drinks for international flight. Very long line for boarding - waited in line nearly an hour.

Wed, 11 Apr
SEA
LGW
20h 15m
Sun, 29 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 19 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

YEG
KEF
Good 7.0

I liked the northern light atmosphere lights and the individual entertainment option.

My economy seat was a bit snug for an average built Person. I am used to being offered some kind of snack, but there is a menu with food and drinks you can choose from for a fee.

BRU
KEF
Good 6.0

Second time I have flown to Brussels with Iceland Air. I love their customer service and especially the flight route. My flight going over was cancelled due to weather. I called their reservation office , had to wait on hold for 1 hour and 15 minutes , but it was worth it. The reservation agent found me a new flight on LH, she explained I would get a conformation about 3 hours after our conversation with the flight information and new txt information. I was able to check in with LH on line that evening. Iceland Air had every pre assigned seats for me.

The boarding process in Kevlavik is pretty awful. No seating around gate areas. You have to stand in line for about 30 minutes to then have to get on shuttle to be driven to plane where you have to walk on stairs to get to plane, or in some cases you actually get to board from the terminal, which happened yesterday. I have MS,and sometimes standing for long periods of time and then having to climb up stairs is difficult for me. I also see a lot of elderly people and parents with babies having difficulty with this boarding process. Their airport really needs major expansion for the amount of people that travel thru their. Seating araes around their gates should be a priority.

KEF
SEA
Mediocre 3.3

Entertainment system appeared to be average, although I didn't use it.

Terrible legroom. Expensive meals and drinks for international flight. Very long line for boarding - waited in line nearly an hour.

KEF
SEA
Good 6.0

The entertainment portion was the biggest positive. Crew was pleasant and non invasive.

Not offering any sort of complimentary food on a 7 hour flight isn't ok. Not being transparent about not offering any sort of food is worse. Boarding was confusing with separate lines, scanning our tickets, herding us into a room, then directing us to go upstairs, then over a ramp, then into our plane without any sort of efficient zone boarding.

Sat, 14 Apr
SEA
LGW
11h 25m
Wed, 25 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

KEF
SEA
Mediocre 3.3

Entertainment system appeared to be average, although I didn't use it.

Terrible legroom. Expensive meals and drinks for international flight. Very long line for boarding - waited in line nearly an hour.

KEF
JFK
Excellent 10.0

On time, comfortable, smooth and easy flights

Everything was fine no complaints

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

Fri, 2 Feb
SEA
LGW
22h 50m
Sun, 11 Feb
LGW
SEA
9h 55m
C$ 728
Trip: 10 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 15 Apr
SEA
LGW
11h 15m
Wed, 25 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 11 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
SEA
Mediocre 3.3

Entertainment system appeared to be average, although I didn't use it.

Terrible legroom. Expensive meals and drinks for international flight. Very long line for boarding - waited in line nearly an hour.

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

Mon, 5 Mar
SEA
LGW
16h 58m
Fri, 9 Mar
LGW
SEA
9h 50m
C$ 750
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 16 Apr
SEA
LGW
11h 15m
Fri, 27 Apr
LGW
SEA
12h 35m
C$ 543
Trip: 12 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

KEF
JFK
Excellent 10.0

On time, comfortable, smooth and easy flights

Everything was fine no complaints

BRU
KEF
Good 6.0

Second time I have flown to Brussels with Iceland Air. I love their customer service and especially the flight route. My flight going over was cancelled due to weather. I called their reservation office , had to wait on hold for 1 hour and 15 minutes , but it was worth it. The reservation agent found me a new flight on LH, she explained I would get a conformation about 3 hours after our conversation with the flight information and new txt information. I was able to check in with LH on line that evening. Iceland Air had every pre assigned seats for me.

The boarding process in Kevlavik is pretty awful. No seating around gate areas. You have to stand in line for about 30 minutes to then have to get on shuttle to be driven to plane where you have to walk on stairs to get to plane, or in some cases you actually get to board from the terminal, which happened yesterday. I have MS,and sometimes standing for long periods of time and then having to climb up stairs is difficult for me. I also see a lot of elderly people and parents with babies having difficulty with this boarding process. Their airport really needs major expansion for the amount of people that travel thru their. Seating araes around their gates should be a priority.

KEF
BOS
Mediocre 2.0

Iceland Air itself is fine.

I had to buy the tickets through JustFly, which is an absolute scam and bilked me out of $750.

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

Sat, 3 Mar
SEA
LGW
18h 35m
Wed, 7 Mar
LGW
SEA
9h 55m
C$ 759
Trip: 5 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 19 Feb
SEA
LGW
11h 35m
Mon, 5 Mar
LGW
SEA
12h 50m
C$ 548
Trip: 15 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
JFK
Excellent 10.0

On time, comfortable, smooth and easy flights

Everything was fine no complaints

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

YEG
KEF
Good 7.0

I liked the northern light atmosphere lights and the individual entertainment option.

My economy seat was a bit snug for an average built Person. I am used to being offered some kind of snack, but there is a menu with food and drinks you can choose from for a fee.

Thu, 25 Jan
SEA
LGW
20h 50m
Wed, 7 Feb
LGW
SEA
9h 55m
C$ 769
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 3 Apr
SEA
LGW
11h 15m
Thu, 3 May
LGW
SEA
12h 35m
C$ 550
Trip: 31 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

KEF
SEA
Mediocre 3.3

Entertainment system appeared to be average, although I didn't use it.

Terrible legroom. Expensive meals and drinks for international flight. Very long line for boarding - waited in line nearly an hour.

KEF
SEA
Good 6.0

The entertainment portion was the biggest positive. Crew was pleasant and non invasive.

Not offering any sort of complimentary food on a 7 hour flight isn't ok. Not being transparent about not offering any sort of food is worse. Boarding was confusing with separate lines, scanning our tickets, herding us into a room, then directing us to go upstairs, then over a ramp, then into our plane without any sort of efficient zone boarding.

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

Wed, 29 Nov
SEA
LGW
35h 30m
Mon, 4 Dec
LGW
SEA
9h 50m
C$ 777
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Sat, 21 Apr
SEA
LGW
11h 25m
Sun, 6 May
LGW
SEA
30h 05m
C$ 550
Trip: 16 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
IAD
Mediocre 3.6

I made it home with my luggage.

Absolutely chaos boarding, seats way to close together in both width and length. They had open seats with more room, told me I couldn’t move seats but let others. Each leg of the flight the pilots landed like the plane fell out of the sky! The crew was yet again nowhere to be found during the flight. They do offer food for sale during the flight but it’s at outrageous Icelandic prices!! Never again!!!

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

KEF
JFK
Excellent 10.0

On time, comfortable, smooth and easy flights

Everything was fine no complaints

LGW
KEF
Excellent 8.3

After a long journey overall, it was nice to have an easy plane ride to Iceland!

N/A

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

Tue, 16 Jan
SEA
LGW
37h 24m
Tue, 30 Jan
LGW
SEA
54h 47m
C$ 777
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Sat, 28 Apr
SEA
LGW
11h 25m
Wed, 16 May
LGW
SEA
30h 20m
C$ 550
Trip: 19 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
KEF
SEA
Good 6.0

The entertainment portion was the biggest positive. Crew was pleasant and non invasive.

Not offering any sort of complimentary food on a 7 hour flight isn't ok. Not being transparent about not offering any sort of food is worse. Boarding was confusing with separate lines, scanning our tickets, herding us into a room, then directing us to go upstairs, then over a ramp, then into our plane without any sort of efficient zone boarding.

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

BOS
KEF
Good 6.6

Service of staff was sub par compared to other airlines serving Germany

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

Tue, 23 Jan
SEA
LGW
37h 24m
Tue, 30 Jan
LGW
SEA
54h 47m
C$ 777
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Sun, 29 Apr
SEA
LGW
11h 15m
Wed, 16 May
LGW
SEA
30h 20m
C$ 550
Trip: 18 days
7.4GoodShow reviews
Overall 7.4 Good
Based on 6262 reviews
Overall
7.6
Boarding
7.3
Comfort
7.5
Crew
8.2
Entertainment
7.8
Food
6.3
BRU
KEF
Good 6.0

Second time I have flown to Brussels with Iceland Air. I love their customer service and especially the flight route. My flight going over was cancelled due to weather. I called their reservation office , had to wait on hold for 1 hour and 15 minutes , but it was worth it. The reservation agent found me a new flight on LH, she explained I would get a conformation about 3 hours after our conversation with the flight information and new txt information. I was able to check in with LH on line that evening. Iceland Air had every pre assigned seats for me.

The boarding process in Kevlavik is pretty awful. No seating around gate areas. You have to stand in line for about 30 minutes to then have to get on shuttle to be driven to plane where you have to walk on stairs to get to plane, or in some cases you actually get to board from the terminal, which happened yesterday. I have MS,and sometimes standing for long periods of time and then having to climb up stairs is difficult for me. I also see a lot of elderly people and parents with babies having difficulty with this boarding process. Their airport really needs major expansion for the amount of people that travel thru their. Seating araes around their gates should be a priority.

HEL
KEF
Good 7.0

food and drink is a nickel and diam which doesn’t go with the brand.

LGW
KEF
Good 6.0

The lights in the cabin were great set up to look like the Aurora

Offered 1 drink and no snack. Rarely do you see the crew on their flights

JFK
KEF
Excellent 8.0

Crew was very nice

No spirits unless you buy. Bring food or you ll starve

KEF
JFK
Excellent 10.0

On time, comfortable, smooth and easy flights

Everything was fine no complaints

Show more results
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Prices are per person, are for e–tickets and include all taxes & fees in CAD.

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please send us an and someone from our team will get back to you promptly.

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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.