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

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

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 46m on average, while flying from Boston to Toronto Pearson Intl Airport is 1h 48m on average. Toronto Pearson Intl Airport is the most popular airport in London, Ontario.

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.

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$ 142 Cheap Flights from the United States to London, Ontario in 2026

1 adult

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Find the cheapest flights from the United States to London

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One-way

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

Enter your travel dates to find the best prices.

6:00 a.m. - 4:45 p.m.

SFO

YXU

7h 45m

1 stop

6:10 a.m. - 12:00 p.m.

YXU

SFO

8h 50m

1 stop

C$ 324WestJet

Mon, 12 Oct - Tue, 20 Oct

6:05 p.m. - 5:20 a.m.

SFO

YXU

8h 15m

1 stop

2:40 p.m. - 9:55 p.m.

YXU

SFO

10h 15m

2 stops

C$ 441WestJet

Fri, 10 Jul - Tue, 14 Jul

4:30 p.m. - 9:20 a.m.

SFO

YXU

13h 50m

2 stops

10:05 a.m. - 3:27 p.m.

YXU

SFO

8h 22m

1 stop

C$ 517Air Canada

Mon, 24 Aug - Wed, 26 Aug

4:30 p.m. - 9:20 a.m.

SFO

YXU

13h 50m

2 stops

5:40 a.m. - 3:22 p.m.

YXU

SFO

12h 42m

2 stops

C$ 525Air Canada

Mon, 24 Aug - Wed, 26 Aug

10:01 p.m. - 5:20 a.m.

SFO

YXU

28h 19m

2 stops

6:10 a.m. - 12:00 p.m.

YXU

SFO

8h 50m

1 stop

C$ 538Multiple Airlines

Thu, 21 May - Tue, 26 May

1:59 a.m. - 9:18 a.m.

ORD

YXU

30h 19m

3 stops

10:05 a.m. - 1:22 p.m.

YXU

ORD

4h 17m

1 stop

C$ 776Multiple Airlines

Fri, 12 Jun - Sat, 20 Jun

2:51 p.m. - 5:20 a.m.

SJC

YXU

11h 29m

2 stops

6:10 a.m. - 7:35 p.m.

YXU

SJC

16h 25m

2 stops

C$ 976Delta

Wed, 10 Jun - Wed, 17 Jun

2:35 p.m. - 5:20 a.m.

SJC

YXU

11h 45m

2 stops

6:10 a.m. - 6:48 p.m.

YXU

SJC

15h 38m

2 stops

C$ 1,037Delta

Mon, 12 Oct - Tue, 20 Oct

11:35 a.m. - 5:33 p.m.

LGA

YXU

5h 58m

1 stop

5:10 a.m. - 9:29 a.m.

YXU

LGA

4h 19m

1 stop

C$ 1,043United Airlines

Fri, 12 Jun - Fri, 19 Jun

2:15 p.m. - 9:38 p.m.

STL

YXU

6h 23m

1 stop

10:05 a.m. - 9:16 p.m.

YXU

STL

12h 11m

2 stops

C$ 1,116United Airlines

Fri, 12 Jun - Fri, 19 Jun

United Airlines flights from United States to London, Ontario

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

United Airlines

24 Aug

SFO11:59 p.m.San Francisco

11h 56m

2 stops

YXU2:55 p.m.London

26 Aug

YXU10:05 a.m.London

8h 22m

1 stop

SFO3:27 p.m.San Francisco

C$ 685

United Airlines

21 Jul

SFO10:47 p.m.San Francisco

7h 33m

1 stop

YXU9:20 a.m.London

23 Jul

YXU6:20 p.m.London

10h 37m

2 stops

SFO1:57 a.m.San Francisco

C$ 694

United Airlines

21 Jul

SFO11:59 p.m.San Francisco

11h 56m

2 stops

YXU2:55 p.m.London

23 Jul

YXU6:20 p.m.London

10h 37m

2 stops

SFO1:57 a.m.San Francisco

C$ 706

WestJet flights from United States to London, Ontario

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

WestJet

12 Oct

SFO6:00 a.m.San Francisco

7h 45m

1 stop

YXU4:45 p.m.London

20 Oct

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

C$ 324

WestJet

10 Jul

SFO6:05 p.m.San Francisco

8h 15m

1 stop

YXU5:20 a.m.London

14 Jul

YXU2:40 p.m.London

10h 15m

2 stops

SFO9:55 p.m.San Francisco

C$ 441

WestJet

5 Jul

SFO6:00 a.m.San Francisco

7h 45m

1 stop

YXU4:45 p.m.London

23 Jul

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

C$ 443

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

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 12/10

6:00 a.m.-4:45 p.m.

1 stop7h 45m

London

Tue 20/10

6:10 a.m.-12:00 p.m.

1 stop8h 50m

C$ 324

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Fri 10/7

6:05 p.m.-5:20 a.m.

1 stop8h 15m

London

Tue 14/7

2:40 p.m.-9:55 p.m.

2 stops10h 15m

C$ 441

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/8

4:30 p.m.-9:20 a.m.

2 stops13h 50m

London

Wed 26/8

10:05 a.m.-3:27 p.m.

1 stop8h 22m

C$ 517

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Mon 24/8

4:30 p.m.-9:20 a.m.

2 stops13h 50m

London

Wed 26/8

5:40 a.m.-3:22 p.m.

2 stops12h 42m

C$ 525

San FranciscoLondon

SFO - YXU

SFOYXU

San Francisco

Thu 21/5

10:01 p.m.-5:20 a.m.

2 stops28h 19m

London

Tue 26/5

6:10 a.m.-12:00 p.m.

1 stop8h 50m

C$ 538

ChicagoLondon

ORD - YXU

ORDYXU

Chicago O'Hare Intl

Fri 12/6

1:59 a.m.-9:18 a.m.

3 stops30h 19m

London

Sat 20/6

10:05 a.m.-1:22 p.m.

1 stop4h 17m

C$ 776

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Wed 10/6

2:51 p.m.-5:20 a.m.

2 stops11h 29m

London

Wed 17/6

6:10 a.m.-7:35 p.m.

2 stops16h 25m

C$ 976

San JoseLondon

SJC - YXU

SJCYXU

San Jose

Mon 12/10

2:35 p.m.-5:20 a.m.

2 stops11h 45m

London

Tue 20/10

6:10 a.m.-6:48 p.m.

2 stops15h 38m

C$ 1,037

Quickest round-trip

New YorkLondon

LGA - YXU

LGAYXU

New York LaGuardia

Fri 12/6

11:35 a.m.-5:33 p.m.

1 stop5h 58m

London

Fri 19/6

5:10 a.m.-9:29 a.m.

1 stop4h 19m

C$ 1,043

St. LouisLondon

STL - YXU

STLYXU

Lambert-St Louis

Fri 12/6

2:15 p.m.-9:38 p.m.

1 stop6h 23m

London

Fri 19/6

10:05 a.m.-9:16 p.m.

2 stops12h 11m

C$ 1,116

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

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.