Find Cheap Flights from Seattle/Tacoma Intl to Chicago (SEA - CHI)

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Good to Know

Low Season:
October
Best time to beat the crowds
2%
expected price decrease
High Season:
June
Most popular time to fly
9%
expected price increase
Average price:
C$ 407
(avg. price over the last 2 weeks)
Good Deal:
C$ 294
or less (round trip)

When to Book Flights from Seattle/Tacoma Intl to Chicago

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$ 294 or less.
The cheapest flight from Seattle/Tacoma Intl to Chicago was found, on average, 35 days before departure.
Book at least 2 weeks before departure in order to get a below-average price.
High season is considered to be May, June and July. The cheapest month to fly is October.
Morning departure is around 15% cheaper 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 Chicago Flights

How long does a flight from Seattle/Tacoma Intl to Chicago take?
An average nonstop flight takes 10h 44m, covering a distance of 2786 km.
How many flights are there between Seattle/Tacoma Intl and Chicago?
There are 868 (nonstop) flights between Seattle/Tacoma Intl and Chicago per week, averaging 128 per day.
Which airlines provide the cheapest flights from Seattle/Tacoma Intl to Chicago?
In the past 3 days, the cheapest round-trip tickets were found on Multiple Airlines (C$ 183) and Spirit Airlines (C$ 225)
Do I need a passport to fly between Seattle/Tacoma Intl and Chicago?
No.
Which airlines fly most frequently between Seattle/Tacoma Intl and Chicago?
Alaska Airlines (15 times daily), United (11 times daily), American Airlines (10 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly from Seattle/Tacoma Intl to Chicago?
For Seattle/Tacoma Intl to Chicago, Wednesday is the cheapest day to fly on average and Friday is the most expensive. Flying from Chicago back to Seattle/Tacoma Intl, the best deals are generally found on Tuesday, with Monday being the most expensive.

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

Airports
Origin
Seattle
C$ 183
only
C$ 183
Destination
Chicago
C$ 183
only
C$ 183
Wed, 10 Jan
SEA
ORD
10h 44m
Tue, 16 Jan
ORD
SEA
14h 56m
C$ 183
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Mon, 29 Jan
SEA
ORD
13h 18m
Wed, 7 Feb
ORD
SEA
11h 39m
C$ 225
Trip: 10 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
IAH
ATL
Excellent 10.0

The price and the flight attendants were awesome despite the snow.

LAS
PIT
Excellent 10.0

Boarding went smoothly and people got settled onto the plane quickly. They don't mess around with boarding.

I hate that every little thing has a fee, and that if you pay for some upgrades you get things that they'd otherwise charge for. For example, if you pay for a carry-on, you are automatically in the first boarding group (so you don't need to pay $6 for expedited boarding if that's your thing).

ATL
BOS
Mediocre 2.0

I liked when the flight was canceled and I got to book with another airline.

Everything about this experience was terrible.

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

IAH
ATL
Good 6.3

Very uncomfortable but I will say I was impressed with the timing- they left on time and arrived early to the destination. But of course upon arrival we had to wait for a gate as they don't have gates immediately available for Spirit...

Tue, 16 Jan
SEA
ORD
13h 09m
Tue, 23 Jan
ORD
SEA
9h 57m
C$ 184
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Wed, 17 Jan
SEA
ORD
14h 36m
Tue, 23 Jan
ORD
SEA
14h 56m
C$ 184
Trip: 7 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 30 Jan
SEA
ORD
13h 09m
Tue, 13 Feb
ORD
SEA
15h 41m
C$ 184
Trip: 15 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 9 Jan
SEA
ORD
13h 16m
Wed, 17 Jan
ORD
SEA
11h 39m
C$ 228
Trip: 9 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
LGA
FLL
Excellent 10.0

We had to cancel our flight and did not make it to Ft. Lauderdale. But your company made our refund process very easy. Thank you

DFW
ATL
Mediocre 2.0

Nothing

Crew was not helpful rude and disengaging

IAH
ATL
Excellent 10.0

The price and the flight attendants were awesome despite the snow.

FLL
DEN
Excellent 10.0

Great seat. They were nice to my service dog

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

Wed, 31 Jan
SEA
ORD
10h 44m
Tue, 13 Feb
ORD
SEA
14h 56m
C$ 184
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Wed, 10 Jan
SEA
ORD
15h 52m
Wed, 24 Jan
ORD
SEA
11h 39m
C$ 228
Trip: 15 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
IAH
ATL
Good 6.3

Very uncomfortable but I will say I was impressed with the timing- they left on time and arrived early to the destination. But of course upon arrival we had to wait for a gate as they don't have gates immediately available for Spirit...

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

DFW
ATL
Mediocre 2.0

Nothing

Crew was not helpful rude and disengaging

LAS
OAK
Mediocre 2.6

It was sweltering hot the whole flight. My shirt was soaked when we finally arrived.

DTW
MCO
Excellent 10.0

Crew was amazing

Nothing

Wed, 7 Feb
SEA
ORD
17h 54m
Tue, 20 Feb
ORD
SEA
15h 41m
C$ 187
Trip: 14 days
Overall 0.0 Poor
Based on 0 reviews
Tue, 30 Jan
SEA
ORD
15h 59m
Wed, 7 Feb
ORD
SEA
11h 39m
C$ 228
Trip: 9 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
LAS
PIT
Excellent 10.0

Boarding went smoothly and people got settled onto the plane quickly. They don't mess around with boarding.

I hate that every little thing has a fee, and that if you pay for some upgrades you get things that they'd otherwise charge for. For example, if you pay for a carry-on, you are automatically in the first boarding group (so you don't need to pay $6 for expedited boarding if that's your thing).

DTW
MCO
Excellent 10.0

Crew was amazing

Nothing

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

FLL
DEN
Excellent 10.0

Great seat. They were nice to my service dog

LGA
FLL
Excellent 10.0

We had to cancel our flight and did not make it to Ft. Lauderdale. But your company made our refund process very easy. Thank you

Tue, 16 Jan
SEA
ORD
16h 42m
Wed, 17 Jan
ORD
SEA
19h 17m
C$ 196
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 19 Jan
SEA
ORD
15h 59m
Mon, 22 Jan
ORD
SEA
19h 17m
C$ 238
Trip: 4 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
LAS
OAK
Mediocre 2.6

It was sweltering hot the whole flight. My shirt was soaked when we finally arrived.

ATL
BOS
Mediocre 2.0

I liked when the flight was canceled and I got to book with another airline.

Everything about this experience was terrible.

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

DFW
LAX
Excellent 10.0

We were on time. They showed class and dedication. The flight was smooth and we arrived earlier than scheduled.

Nothing I can think of

BOS
FLL
Good 6.3

The price.

no greeting from the captain and no other update from the crew during the flight. The plane was new, and had a utilitarian feel, not luxurious for sure( but not bad)

Wed, 17 Jan
SEA
ORD
10h 44m
Mon, 22 Jan
ORD
SEA
19h 17m
C$ 196
Trip: 6 days
Overall 0.0 Poor
Based on 0 reviews
Thu, 1 Feb
SEA
ORD
15h 59m
Mon, 5 Feb
ORD
SEA
19h 17m
C$ 239
Trip: 5 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
LAS
OAK
Mediocre 2.6

It was sweltering hot the whole flight. My shirt was soaked when we finally arrived.

IAH
ATL
Good 6.3

Very uncomfortable but I will say I was impressed with the timing- they left on time and arrived early to the destination. But of course upon arrival we had to wait for a gate as they don't have gates immediately available for Spirit...

DFW
LAX
Excellent 10.0

We were on time. They showed class and dedication. The flight was smooth and we arrived earlier than scheduled.

Nothing I can think of

DTW
MCO
Excellent 10.0

Crew was amazing

Nothing

BOS
FLL
Good 6.3

The price.

no greeting from the captain and no other update from the crew during the flight. The plane was new, and had a utilitarian feel, not luxurious for sure( but not bad)

Mon, 22 Jan
SEA
ORD
13h 18m
Tue, 23 Jan
ORD
SEA
15h 41m
C$ 196
Trip: 2 days
Overall 0.0 Poor
Based on 0 reviews
Wed, 10 Jan
SEA
ORD
15h 52m
Sun, 28 Jan
ORD
SEA
19h 17m
C$ 241
Trip: 19 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
ATL
BOS
Mediocre 2.0

I liked when the flight was canceled and I got to book with another airline.

Everything about this experience was terrible.

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

IAH
ATL
Good 6.3

Very uncomfortable but I will say I was impressed with the timing- they left on time and arrived early to the destination. But of course upon arrival we had to wait for a gate as they don't have gates immediately available for Spirit...

LGA
FLL
Excellent 10.0

We had to cancel our flight and did not make it to Ft. Lauderdale. But your company made our refund process very easy. Thank you

DFW
ATL
Mediocre 2.0

Nothing

Crew was not helpful rude and disengaging

Wed, 31 Jan
SEA
ORD
14h 36m
Wed, 7 Feb
ORD
SEA
19h 17m
C$ 196
Trip: 8 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 2 Feb
SEA
ORD
15h 59m
Mon, 5 Feb
ORD
SEA
19h 17m
C$ 241
Trip: 4 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
IAH
ATL
Excellent 10.0

The price and the flight attendants were awesome despite the snow.

DTW
MCO
Excellent 10.0

Crew was amazing

Nothing

DFW
ATL
Mediocre 2.0

Nothing

Crew was not helpful rude and disengaging

ATL
BOS
Mediocre 2.0

I liked when the flight was canceled and I got to book with another airline.

Everything about this experience was terrible.

LAS
MCI
Excellent 10.0

Staff was friendly and flight was easy. No issues.

Mon, 12 Feb
SEA
ORD
13h 18m
Tue, 20 Feb
ORD
SEA
15h 41m
C$ 196
Trip: 9 days
Overall 0.0 Poor
Based on 0 reviews
Fri, 9 Feb
SEA
ORD
15h 59m
Wed, 14 Feb
ORD
SEA
11h 39m
C$ 241
Trip: 6 days
5.4OkayShow reviews
Overall 5.4 Okay
Based on 51249 reviews
Overall
5.6
Boarding
6.0
Comfort
5.3
Crew
6.4
Entertainment
4.5
Food
4.6
IAH
ATL
Good 6.3

Very uncomfortable but I will say I was impressed with the timing- they left on time and arrived early to the destination. But of course upon arrival we had to wait for a gate as they don't have gates immediately available for Spirit...

DFW
ATL
Mediocre 2.0

Nothing

Crew was not helpful rude and disengaging

LGA
FLL
Excellent 10.0

We had to cancel our flight and did not make it to Ft. Lauderdale. But your company made our refund process very easy. Thank you

BOS
FLL
Good 6.3

The price.

no greeting from the captain and no other update from the crew during the flight. The plane was new, and had a utilitarian feel, not luxurious for sure( but not bad)

LAS
PIT
Excellent 10.0

Boarding went smoothly and people got settled onto the plane quickly. They don't mess around with boarding.

I hate that every little thing has a fee, and that if you pay for some upgrades you get things that they'd otherwise charge for. For example, if you pay for a carry-on, you are automatically in the first boarding group (so you don't need to pay $6 for expedited boarding if that's your thing).

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

We attempt to get accurate prices, however, prices are not guaranteed.

Here's why:

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At KAYAK we don’t set the prices, so it’s not possible for us to guarantee what other companies are selling.

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Our service lets you quickly and easily compare results from hundreds of travel sites at once. In this sense, KAYAK is a search engine and we can't guarantee prices we find.

Why aren’t prices accurate 100% of the time?
Prices on airline seats, hotel rooms and car rentals can change frequently. Several people may also be trying to buy the same travel option simultaneously. As a result, you may find, on occasion, that certain prices are no longer available.

If you have more questions or if you have a bad price to report to us,
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.