C$ 142 Find Cheap Flights from the United States to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight to London departing on 21/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to London

 
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results for flights to London, as well as popular online travel agencies
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Flight Deals

Cheap Flights from the United States to London

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from the United States to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from the United States to London

Fri, 10 Jul - Tue, 14 Jul
WestJet Logo
6:05 p.m. - 5:20 a.m.
SFO
-
YXU
8h 15m
1 stop
WestJet Logo
2:40 p.m. - 9:55 p.m.
YXU
-
SFO
10h 15m
2 stops
C$ 441WestJet
Sun, 5 Jul - Thu, 23 Jul
WestJet Logo
6:00 a.m. - 4:45 p.m.
SFO
-
YXU
7h 45m
1 stop
WestJet Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
C$ 443WestJet
Fri, 31 Jul - Sun, 9 Aug
WestJet Logo
12:15 p.m. - 4:45 p.m.
DEN
-
YXU
26h 30m
1 stop
WestJet Logo
5:55 p.m. - 11:20 a.m.
YXU
-
DEN
19h 25m
1 stop
C$ 478WestJet
Mon, 24 Aug - Wed, 26 Aug
Air Canada Logo
4:30 p.m. - 9:20 a.m.
SFO
-
YXU
13h 50m
2 stops
Air Canada Logo
3:30 p.m. - 9:02 p.m.
YXU
-
SFO
8h 32m
1 stop
C$ 517Air Canada
Mon, 24 Aug - Wed, 26 Aug
Air Canada Logo
4:30 p.m. - 9:20 a.m.
SFO
-
YXU
13h 50m
2 stops
Air Canada Logo
3:30 p.m. - 12:07 a.m.
YXU
-
SFO
11h 37m
2 stops
C$ 525Air Canada
Thu, 21 May - Tue, 26 May
Multiple Airlines Logo
10:01 p.m. - 5:20 a.m.
SFO
-
YXU
28h 19m
2 stops
Multiple Airlines Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
C$ 538Multiple Airlines
Thu, 21 May - Tue, 26 May
Multiple Airlines Logo
10:01 p.m. - 5:20 a.m.
SFO
-
YXU
28h 19m
2 stops
Multiple Airlines Logo
6:10 a.m. - 12:00 p.m.
YXU
-
SFO
8h 50m
1 stop
C$ 680Multiple Airlines
Wed, 10 Jun - Wed, 17 Jun
Delta Logo
2:51 p.m. - 5:20 a.m.
SJC
-
YXU
11h 29m
2 stops
Delta Logo
6:10 a.m. - 7:35 p.m.
YXU
-
SJC
16h 25m
2 stops
C$ 976Delta
Mon, 12 Oct - Tue, 20 Oct
Delta Logo
2:35 p.m. - 5:20 a.m.
SJC
-
YXU
11h 45m
2 stops
Delta Logo
6:10 a.m. - 6:48 p.m.
YXU
-
SJC
15h 38m
2 stops
C$ 1,037Delta
Sat, 29 Aug - Tue, 1 Sep
United Airlines Logo
6:37 p.m. - 5:45 p.m.
SJC
-
YXU
20h 08m
2 stops
United Airlines Logo
5:40 a.m. - 9:10 p.m.
YXU
-
SJC
18h 30m
2 stops
C$ 1,263United Airlines
Booking Insights

KAYAK's insights & trends for flights to London

Get data-powered insights and trends into flights to London to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest flight to London?

These are the best round-trip prices found by users searching on KAYAK in the last 72 hours.

In the last 3 days, the cheapest flight deal to London was found on the route from San Francisco, at C$ 441 return. The most popular connection is from Calgary to London and KAYAK users have found round-trip deals for as low as C$ 405 in the last 3 days.

Expert advice

Expert advice for your flight to London

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on Air Canada, WestJet and United Airlines

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Good to know

Cheapest flightC$ 293
Flight from San Francisco to London

FAQs - booking London flights

  • What is the cheapest flight to London?

    In the last 3 days, the cheapest flight deal to London was found on the route from San Francisco, at C$ 441 return. The most popular connection is from Calgary to London and KAYAK users have found round-trip deals for as low as C$ 405 in the last 3 days.

  • How far is London Airport from central London?

    There are 9 km between London downtown and London Airport.

  • What is the name of London’s airport?

    There is only 1 airport in London, called London Airport (YXU). It can also be referred to as London or London Intl.

  • How does KAYAK find such low prices on flights to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London is likely to change within 7 days, so travellers know whether to wait or book now.

  • What is the Hacker Fare option on flights to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to London are there each week?

    Each week there are around 163 direct flights from within United States to London. The most common day for departures is Thursday, with 15% of flights taking off on this day.

Top tips for finding cheap flights to London

  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest London flight deals.

Travelling to a place near London?

Book flights to London if you plan to visit one of these locations
Grand Bend
Port Stanley

Everything you need to know for your flight to London

Information on the airport you'll fly into in London