Which airlines fly to United States?

Porter Airlines, Air Canada and WestJet are the top three most popular airlines that fly to United States from London, Ontario according to our data. Porter Airlines is the first choice among our users, with 42% 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?

WestJet, United Airlines, and Delta 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 May 2026, there are 2 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$ 220 Cheap Flights from London, Ontario to the United States in 2026

1 adult

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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.

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

YXU

SFO

8h 50m

1 stop

6:00 a.m. - 5:20 a.m.

SFO

YXU

20h 20m

1 stop

C$ 394WestJet

Thu, 8 Oct - Tue, 13 Oct

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

YXU

SFO

8h 50m

1 stop

6:00 a.m. - 5:20 a.m.

SFO

YXU

20h 20m

1 stop

C$ 395WestJet

Thu, 8 Oct - Tue, 13 Oct

2:40 p.m. - 12:00 p.m.

YXU

SFO

24h 20m

2 stops

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

SFO

YXU

7h 45m

1 stop

C$ 414WestJet

Tue, 21 Jul - Thu, 30 Jul

5:40 a.m. - 10:39 a.m.

YXU

SFO

7h 59m

1 stop

11:35 a.m. - 9:40 p.m.

SFO

YXU

7h 05m

1 stop

C$ 436Air Canada

Wed, 21 Oct - Sat, 24 Oct

5:40 a.m. - 10:39 a.m.

YXU

SFO

7h 59m

1 stop

8:10 a.m. - 9:40 p.m.

SFO

YXU

10h 30m

2 stops

C$ 442Air Canada

Wed, 21 Oct - Sat, 24 Oct

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

5:54 p.m. - 5:20 a.m.

PDX

YXU

8h 26m

2 stops

C$ 748Delta

Tue, 11 Aug - Wed, 12 Aug

6:10 a.m. - 1:50 p.m.

YXU

PDX

10h 40m

1 stop

5:54 p.m. - 5:20 a.m.

PDX

YXU

8h 26m

2 stops

C$ 755Delta

Tue, 11 Aug - Wed, 12 Aug

5:55 p.m. - 1:50 p.m.

YXU

PDX

22h 55m

1 stop

10:42 a.m. - 4:45 p.m.

PDX

YXU

27h 03m

2 stops

C$ 812Multiple Airlines

Mon, 22 Jun - Sun, 28 Jun

2:40 p.m. - 8:55 p.m.

YXU

HNL

36h 15m

3 stops

9:55 p.m. - 5:20 a.m.

HNL

YXU

25h 25m

3 stops

C$ 1,088Multiple Airlines

Tue, 16 Jun - Wed, 24 Jun

5:10 a.m. - 9:43 p.m.

YXU

HNL

22h 33m

3 stops

4:00 p.m. - 5:33 p.m.

HNL

YXU

19h 33m

2 stops

C$ 1,507United Airlines

Thu, 28 May - Mon, 1 Jun

WestJet flights from London, Ontario to United States

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

WestJet

8 Oct

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

13 Oct

SFO6:00 a.m.San Francisco

20h 20m

1 stop

YXU5:20 a.m.London

C$ 394

WestJet

8 Oct

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

13 Oct

SFO6:00 a.m.San Francisco

20h 20m

1 stop

YXU5:20 a.m.London

C$ 395

WestJet

8 Oct

YXU6:10 a.m.London

8h 50m

1 stop

SFO12:00 p.m.San Francisco

13 Oct

SFO6:00 a.m.San Francisco

20h 20m

1 stop

YXU5:20 a.m.London

C$ 397

Air Canada flights from London, Ontario to United States

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

Air Canada

21 Oct

YXU5:40 a.m.London

7h 59m

1 stop

SFO10:39 a.m.San Francisco

24 Oct

SFO11:35 a.m.San Francisco

7h 05m

1 stop

YXU9:40 p.m.London

C$ 436

Air Canada

21 Oct

YXU5:40 a.m.London

7h 59m

1 stop

SFO10:39 a.m.San Francisco

24 Oct

SFO8:10 a.m.San Francisco

10h 30m

2 stops

YXU9:40 p.m.London

C$ 442

Air Canada

8 Oct

YXU5:40 a.m.London

9h 54m

1 stop

SFO12:34 p.m.San Francisco

13 Oct

SFO11:10 a.m.San Francisco

19h 10m

2 stops

YXU9:20 a.m.London

C$ 469

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 8/10

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

1 stop8h 50m

San Francisco

Tue 13/10

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 394

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/10

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

1 stop8h 50m

San Francisco

Tue 13/10

6:00 a.m.-5:20 a.m.

1 stop20h 20m

C$ 395

LondonSan Francisco

YXU - SFO

YXUSFO

London

Tue 21/7

2:40 p.m.-12:00 p.m.

2 stops24h 20m

San Francisco

Thu 30/7

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

1 stop7h 45m

C$ 414

Quickest round-trip

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 21/10

5:40 a.m.-10:39 a.m.

1 stop7h 59m

San Francisco

Sat 24/10

11:35 a.m.-9:40 p.m.

1 stop7h 05m

C$ 436

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 21/10

5:40 a.m.-10:39 a.m.

1 stop7h 59m

San Francisco

Sat 24/10

8:10 a.m.-9:40 p.m.

2 stops10h 30m

C$ 442

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

5:54 p.m.-5:20 a.m.

2 stops8h 26m

C$ 748

LondonPortland

YXU - PDX

YXUPDX

London

Tue 11/8

6:10 a.m.-1:50 p.m.

1 stop10h 40m

Portland

Wed 12/8

5:54 p.m.-5:20 a.m.

2 stops8h 26m

C$ 755

LondonPortland

YXU - PDX

YXUPDX

London

Mon 22/6

5:55 p.m.-1:50 p.m.

1 stop22h 55m

Portland

Sun 28/6

10:42 a.m.-4:45 p.m.

2 stops27h 03m

C$ 812

LondonHonolulu

YXU - HNL

YXUHNL

London

Tue 16/6

2:40 p.m.-8:55 p.m.

3 stops36h 15m

Honolulu

Wed 24/6

9:55 p.m.-5:20 a.m.

3 stops25h 25m

C$ 1,088

LondonHonolulu

YXU - HNL

YXUHNL

London

Thu 28/5

5:10 a.m.-9:43 p.m.

3 stops22h 33m

Honolulu

Mon 1/6

4:00 p.m.-5:33 p.m.

2 stops19h 33m

C$ 1,507

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 May is, on average, the cheapest month to fly to United States from London, Ontario, with most prices found around C$ 176. If you don’t want to visit United States in May, then you should wait until April to fly from London, Ontario, when ticket prices are also cheap, with an average price of C$ 186.

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

You could potentially save up to 17% 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 May 2026, there are 2 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 Airbus A321-100/200, representing 18.75% of all bookings. The subsequent popular models are Boeing 737-800 Passenger/BBJ2 (winglets) at 18.75%, Embraer 195 E2 at 18.75%, and Airbus A320neo at 12.50%.

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$ 218	Free Cancellation	Rating 7.2 3,332 reviews		Search WestJet flights
Air Canada	PriceFrom C$ 252	Free Cancellation	Rating 7.1 11,012 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.