Which airlines fly to United States?

Air Canada, Porter Airlines and WestJet are the top three most popular airlines that fly to United States from London, Ontario according to our data. Air Canada is the first choice among our users, with 39% of people opting to fly with this airline when travelling to United States. Keep in mind that there are 12 different airlines that fly to United States on a routine basis, so you have a few additional options to choose from.

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

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

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

Prices for flights from London Airport to United States refresh daily.

How many operators does momondo search for flights from London Airport to United States?

As of June 2026, there are 3 operators available to choose from for flights from London Airport to United States.

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

Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to United States.

What documentation or ID do you need to fly to United States?

The travel and health documents you'll need for your trip to United States may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at United States. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

C$ 231 Cheap Flights from London, Ontario to the United States in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from London, Ontario to the United States

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

8:40 p.m. - 9:55 p.m.

YXU

SFO

28h 15m

1 stop

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

SFO

YXU

8h 15m

1 stop

C$ 429WestJet

Thu, 6 Aug - Thu, 13 Aug

6:10 a.m. - 6:45 p.m.

YXU

SEA

15h 35m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 463WestJet

Wed, 23 Sep - Wed, 7 Oct

5:55 p.m. - 12:00 p.m.

YXU

SFO

21h 05m

1 stop

6:00 a.m. - 1:50 p.m.

SFO

YXU

28h 50m

2 stops

C$ 468WestJet

Thu, 6 Aug - Thu, 13 Aug

5:55 p.m. - 6:45 p.m.

YXU

SEA

27h 50m

1 stop

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

SEA

YXU

6h 45m

1 stop

C$ 485WestJet

Wed, 19 Aug - Wed, 16 Sep

6:10 a.m. - 2:10 p.m.

YXU

SAN

11h 00m

1 stop

3:30 p.m. - 5:20 a.m.

SAN

YXU

10h 50m

1 stop

C$ 496WestJet

Mon, 28 Sep - Tue, 29 Sep

5:45 a.m. - 1:15 p.m.

YXU

SFO

10h 30m

1 stop

2:15 p.m. - 9:06 a.m.

SFO

YXU

15h 51m

1 stop

C$ 578Air Canada

Wed, 18 Nov - Wed, 2 Dec

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

YXU

SFO

19h 00m

2 stops

4:40 p.m. - 9:20 a.m.

SFO

YXU

13h 40m

1 stop

C$ 589Air Canada

Mon, 28 Sep - Tue, 29 Sep

3:30 p.m. - 10:58 a.m.

YXU

SAN

22h 28m

2 stops

1:24 p.m. - 9:20 a.m.

SAN

YXU

16h 56m

2 stops

C$ 623United Airlines

Mon, 28 Sep - Tue, 29 Sep

3:30 p.m. - 10:41 p.m.

YXU

SAN

10h 11m

2 stops

7:41 p.m. - 2:55 p.m.

SAN

YXU

16h 14m

3 stops

C$ 631United Airlines

Mon, 28 Sep - Tue, 29 Sep

6:10 a.m. - 2:10 p.m.

YXU

SAN

11h 00m

1 stop

4:08 p.m. - 5:20 a.m.

SAN

YXU

10h 12m

2 stops

C$ 768Delta

Mon, 28 Sep - Tue, 29 Sep

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Air Canada flights from London, Ontario to United States

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

Air Canada

23 Sep

YXU5:40 a.m.London

9h 54m

1 stop

SFO12:34 p.m.San Francisco

26 Sep

SFO12:50 p.m.San Francisco

17h 30m

2 stops

YXU9:20 a.m.London

C$ 563

Air Canada

18 Nov

YXU5:45 a.m.London

10h 30m

1 stop

SFO1:15 p.m.San Francisco

2 Dec

SFO2:15 p.m.San Francisco

15h 51m

1 stop

YXU9:06 a.m.London

C$ 578

Air Canada

28 Sep

YXU6:20 p.m.London

19h 00m

2 stops

SFO10:20 a.m.San Francisco

29 Sep

SFO4:40 p.m.San Francisco

13h 40m

1 stop

YXU9:20 a.m.London

C$ 589

WestJet flights from London, Ontario to United States

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

WestJet

12 Aug

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

19 Aug

SFO6:00 a.m.San Francisco

7h 45m

1 stop

YXU4:45 p.m.London

C$ 425

WestJet

6 Aug

YXU8:40 p.m.London

28h 15m

1 stop

SFO9:55 p.m.San Francisco

13 Aug

SFO6:05 p.m.San Francisco

8h 15m

1 stop

YXU5:20 a.m.London

C$ 429

WestJet

23 Sep

YXU6:10 a.m.London

15h 35m

1 stop

SEA6:45 p.m.Seattle/Tacoma Intl

7 Oct

SEA7:35 p.m.Seattle/Tacoma Intl

6h 45m

1 stop

YXU5:20 a.m.London

C$ 463

momondo Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 6/8

8:40 p.m.-9:55 p.m.

1 stop28h 15m

San Francisco

Thu 13/8

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

1 stop8h 15m

C$ 429

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 23/9

6:10 a.m.-6:45 p.m.

1 stop15h 35m

Seattle/Tacoma Intl

Wed 7/10

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

1 stop6h 45m

C$ 463

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 6/8

5:55 p.m.-12:00 p.m.

1 stop21h 05m

San Francisco

Thu 13/8

6:00 a.m.-1:50 p.m.

2 stops28h 50m

C$ 468

LondonSeattle

YXU - SEA

YXUSEA

London

Wed 19/8

5:55 p.m.-6:45 p.m.

1 stop27h 50m

Seattle/Tacoma Intl

Wed 16/9

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

1 stop6h 45m

C$ 485

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

6:10 a.m.-2:10 p.m.

1 stop11h 00m

San Diego

Tue 29/9

3:30 p.m.-5:20 a.m.

1 stop10h 50m

C$ 496

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 18/11

5:45 a.m.-1:15 p.m.

1 stop10h 30m

San Francisco

Wed 2/12

2:15 p.m.-9:06 a.m.

1 stop15h 51m

C$ 578

LondonSan Francisco

YXU - SFO

YXUSFO

London

Mon 28/9

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

2 stops19h 00m

San Francisco

Tue 29/9

4:40 p.m.-9:20 a.m.

1 stop13h 40m

C$ 589

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

3:30 p.m.-10:58 a.m.

2 stops22h 28m

San Diego

Tue 29/9

1:24 p.m.-9:20 a.m.

2 stops16h 56m

C$ 623

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

3:30 p.m.-10:41 p.m.

2 stops10h 11m

San Diego

Tue 29/9

7:41 p.m.-2:55 p.m.

3 stops16h 14m

C$ 631

Quickest round-trip

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 28/9

6:10 a.m.-2:10 p.m.

1 stop11h 00m

San Diego

Tue 29/9

4:08 p.m.-5:20 a.m.

2 stops10h 12m

C$ 768

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 London, Ontario to United States

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

What is the cheapest month to fly to United States?

The month of August is, on average, the cheapest month to fly to United States from London, Ontario, with most prices found around C$ 225. If you don’t want to visit United States in August, then you should wait until May to fly from London, Ontario, when ticket prices are also cheap, with an average price of C$ 303.

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

You could potentially save up to 18% on your flight if you consider stops on a London, Ontario to United States flight.

Cheap London, Ontario to United States flight deals and tips

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

Fastest flight time	3h 30m
Direct flights	None

The fastest flight from London, Ontario to United States takes 3h 30m

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

Search flight deals

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

When did momondo last update prices for flights from London Airport to United States?
Prices for flights from London Airport to United States refresh daily.
How many operators does momondo search for flights from London Airport to United States?
As of June 2026, there are 3 operators available to choose from for flights from London Airport to United States.
How old do you have to be to fly from London Airport to United States?
Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from London Airport to United States.
What documentation or ID do you need to fly to United States?
The travel and health documents you'll need for your trip to United States may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at United States. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from London, Ontario to United States?
momondo data reveals that the most frequently booked plane model on the route from London, Ontario to United States is Boeing 737-800 Passenger/BBJ2 (winglets), representing 33.33% of all bookings. The subsequent popular models are Airbus A320neo at 16.67%, Airbus A321-100/200 at 16.67%, and Airbus A321neo at 16.67%.

Best airlines flying from London, Ontario to United States

Compare and see reviews for airlines that fly from London, Ontario to United States with momondo

Airline	Rating	Free Cancellation	Price
WestJet	PriceFrom C$ 226	Free Cancellation	Rating 7.2 3,379 reviews		Search WestJet flights
Air Canada	PriceFrom C$ 262	Free Cancellation	Rating 7.1 11,244 reviews		Search Air Canada flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from London to United States for you.

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

Yes. momondo enables you to select and highlight flights to United States from London with this policy.

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

Once you have performed a search for London to United States flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

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

Yes. momondo can track prices for London to United States flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.