What is the cheapest airline that flies from United States to London?

WestJet, Air Canada, and United Airlines are the most popular carriers operating from United States to London

Which airlines fly to London, Ontario?

Air Canada, Porter Airlines and WestJet are the top three most popular airlines that fly to London, Ontario from United States according to our data. Air Canada is the first choice among our users, with 42% of people opting to fly with this airline when travelling to London, Ontario. Keep in mind that there are 9 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.

How long does it take to fly to London, Ontario?

The average flight duration from United States to London, Ontario depends on which airport you fly into and out of. Flying from New York to Toronto Pearson Intl Airport is 1h 45m on average, while flying from Boston to Toronto Pearson Intl Airport is 1h 53m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

When did momondo last update prices for flights from United States to London Airport?

Prices for flights from United States to London Airport were last updated today.

How old do you have to be to fly from United States to London Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to London Airport.

What documentation or ID do you need to fly to London Airport?

The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

C$ 371 Cheap Flights from the United States to London in 2026

1 adult

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Find the cheapest flights from the United States to London

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

Enter your travel dates to find the best prices.

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

5:55 p.m. - 9:40 a.m.

YXU

SEA

18h 45m

1 stop

C$ 524WestJet

Tue, 2 Jun - Tue, 9 Jun

7:00 a.m. - 4:45 p.m.

SEA

YXU

6h 45m

1 stop

2:40 p.m. - 9:00 p.m.

YXU

SEA

9h 20m

2 stops

C$ 546WestJet

Thu, 18 Jun - Sun, 21 Jun

7:00 a.m. - 4:45 p.m.

SEA

YXU

6h 45m

1 stop

5:55 p.m. - 9:40 a.m.

YXU

SEA

18h 45m

1 stop

C$ 556WestJet

Thu, 18 Jun - Sun, 21 Jun

7:35 p.m. - 5:20 a.m.

SEA

YXU

6h 45m

1 stop

2:40 p.m. - 9:40 a.m.

YXU

SEA

22h 00m

2 stops

C$ 619WestJet

Tue, 2 Jun - Tue, 9 Jun

7:20 p.m. - 8:55 a.m.

SEA

YXU

10h 35m

2 stops

3:30 p.m. - 9:04 p.m.

YXU

SEA

8h 34m

1 stop

C$ 724Air Canada

Tue, 22 Sep - Wed, 7 Oct

5:40 a.m. - 5:45 p.m.

SEA

YXU

9h 05m

2 stops

5:40 a.m. - 2:22 p.m.

YXU

SEA

11h 42m

2 stops

C$ 731Air Canada

Tue, 22 Sep - Wed, 7 Oct

10:39 p.m. - 5:20 a.m.

DEN

YXU

28h 41m

2 stops

5:55 p.m. - 11:20 a.m.

YXU

DEN

19h 25m

1 stop

C$ 853Multiple Airlines

Sat, 4 Jul - Sat, 11 Jul

6:50 a.m. - 5:20 a.m.

ORD

YXU

21h 30m

2 stops

6:10 a.m. - 4:40 p.m.

YXU

ORD

11h 30m

1 stop

C$ 861Multiple Airlines

Thu, 7 May - Sun, 10 May

9:00 a.m. - 2:58 p.m.

EWR

YXU

5h 58m

2 stops

12:20 p.m. - 4:47 p.m.

YXU

EWR

4h 27m

1 stop

C$ 998United Airlines

Tue, 2 Jun - Tue, 9 Jun

10:30 a.m. - 2:58 p.m.

LGA

YXU

4h 28m

1 stop

12:20 p.m. - 6:10 p.m.

YXU

LGA

5h 50m

1 stop

C$ 999United Airlines

Tue, 2 Jun - Tue, 9 Jun

WestJet flights from United States to London, Ontario

Our best WestJet deals on United States to London, Ontario flight tickets

WestJet

2 Jun

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

9 Jun

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

C$ 524

WestJet

18 Jun

SEA7:00 a.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU4:45 p.m.London

21 Jun

YXU2:40 p.m.London

9h 20m

2 stops

SEA9:00 p.m.Seattle/Tacoma Intl

C$ 546

WestJet

18 Jun

SEA7:00 a.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU4:45 p.m.London

21 Jun

YXU5:55 p.m.London

18h 45m

1 stop

SEA9:40 a.m.Seattle/Tacoma Intl

C$ 556

Air Canada flights from United States to London, Ontario

Our best Air Canada deals on United States to London, Ontario flight tickets

Air Canada

22 Sep

SEA7:20 p.m.Seattle/Tacoma Intl

10h 35m

2 stops

YXU8:55 a.m.London

7 Oct

YXU3:30 p.m.London

8h 34m

1 stop

SEA9:04 p.m.Seattle/Tacoma Intl

C$ 724

Air Canada

22 Sep

SEA5:40 a.m.Seattle/Tacoma Intl

9h 05m

2 stops

YXU5:45 p.m.London

7 Oct

YXU5:40 a.m.London

11h 42m

2 stops

SEA2:22 p.m.Seattle/Tacoma Intl

C$ 731

Air Canada

9 May

IAD9:45 a.m.Washington, D.C. Dulles Intl

7h 48m

2 stops

YXU5:33 p.m.London

15 May

YXU9:30 a.m.London

5h 59m

1 stop

IAD3:29 p.m.Washington, D.C. Dulles Intl

C$ 739

momondo Fare Finder

Use the filters below to find and compare flights from the United States to London, Ontario that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 2/6

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Tue 9/6

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 524

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 18/6

7:00 a.m.-4:45 p.m.

1 stop6h 45m

London

Sun 21/6

2:40 p.m.-9:00 p.m.

2 stops9h 20m

C$ 546

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Thu 18/6

7:00 a.m.-4:45 p.m.

1 stop6h 45m

London

Sun 21/6

5:55 p.m.-9:40 a.m.

1 stop18h 45m

C$ 556

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 2/6

7:35 p.m.-5:20 a.m.

1 stop6h 45m

London

Tue 9/6

2:40 p.m.-9:40 a.m.

2 stops22h 00m

C$ 619

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 22/9

7:20 p.m.-8:55 a.m.

2 stops10h 35m

London

Wed 7/10

3:30 p.m.-9:04 p.m.

1 stop8h 34m

C$ 724

SeattleLondon

SEA - YXU

SEAYXU

Seattle/Tacoma Intl

Tue 22/9

5:40 a.m.-5:45 p.m.

2 stops9h 05m

London

Wed 7/10

5:40 a.m.-2:22 p.m.

2 stops11h 42m

C$ 731

DenverLondon

DEN - YXU

DENYXU

Denver Intl

Sat 4/7

10:39 p.m.-5:20 a.m.

2 stops28h 41m

London

Sat 11/7

5:55 p.m.-11:20 a.m.

1 stop19h 25m

C$ 853

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Thu 7/5

6:50 a.m.-5:20 a.m.

2 stops21h 30m

London

Sun 10/5

6:10 a.m.-4:40 p.m.

1 stop11h 30m

C$ 861

NewarkLondon

EWR - YXU

EWRYXU

Newark

Tue 2/6

9:00 a.m.-2:58 p.m.

2 stops5h 58m

London

Tue 9/6

12:20 p.m.-4:47 p.m.

1 stop4h 27m

C$ 998

Quickest round-trip

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Tue 2/6

10:30 a.m.-2:58 p.m.

1 stop4h 28m

London

Tue 9/6

12:20 p.m.-6:10 p.m.

1 stop5h 50m

C$ 999

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from United States to London, Ontario

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest United States to London flight route?

Fly from Orlando to London for the best United States - London flight prices

What cabin class options are available on United States to London flights?

There is only 1 cabin class available to choose from on United States to London flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on United States to London, Ontario flights?

You could potentially save up to 16% on your flight if you consider stops on a United States to London, Ontario flight.

Cheap United States to London, Ontario flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from United States to London, Ontario

Fastest flight time	3h 55m
Direct flights	None

The fastest flight from United States to London, Ontario takes 3h 55m

There are no direct flights from United States to London, Ontario. There are no popular flight routes from United States to London, Ontario.

Search flight deals

Frequently asked questions about flying from the United States to London, Ontario

When did momondo last update prices for flights from United States to London Airport?
Prices for flights from United States to London Airport were last updated today.
How old do you have to be to fly from United States to London Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from United States to London Airport.
What documentation or ID do you need to fly to London Airport?
The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular plane model from United States to London, Ontario?
Based on momondo bookings for this flight route, the most popular plane model on flight routes from United States to London, Ontario is Boeing 737-800 Passenger/BBJ2 (winglets) (100.00% of total bookings).

Grand Bend

Port Stanley

Why use momondo?

Why should I use momondo to find a flight deal from United States to London?

Finding the right flight to London from United States is quick and easy when you have a range of options in front of you, from reputable agents and recognizable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to London quick and easy, saving you time and money.

Can I find flights from United States to London with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for United States to London flights to just show those with flexible booking policies.

How can momondo help me find flights from United States to London?

momondo provides multiple filters to help you find the best flight to London from United States. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from United States to London right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of United States to London flights. All you need is a valid email address and we will do the rest; it is that quick and easy.