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Cheap flights from London, Ontario to the United States from $155

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London, Ontario to the United States departing on 9/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from London, Ontario to the United States

Cheap round-trip flights

WestJet Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
WestJet Logo
7:30 am - 7:07 pmSFO-YXU
8h 37m1 stop
$286WestJet
Find Deal
Wed, Sep 10 - Tue, Sep 23
Logo
6:00 am - 11:54 amYXU-SFO
8h 54m1 stop
Logo
10:15 am - 5:12 amSFO-YXU
15h 57m3 stops
$303
Find Deal
Wed, Sep 10 - Tue, Sep 23
Air Canada Logo
3:50 pm - 8:53 pmYXU-SFO
8h 03m1 stop
Air Canada Logo
4:35 pm - 9:19 amSFO-YXU
13h 44m2 stops
$304Air Canada
Find Deal
Wed, Sep 10 - Tue, Sep 23
WestJet Logo
6:00 am - 11:56 amYXU-SFO
8h 56m1 stop
WestJet Logo
2:45 pm - 5:12 amSFO-YXU
11h 27m2 stops
$305WestJet
Find Deal
Thu, Aug 28 - Sat, Sep 6
WestJet Logo
6:00 am - 11:56 amYXU-SFO
8h 56m1 stop
WestJet Logo
7:30 am - 7:07 pmSFO-YXU
8h 37m1 stop
$308WestJet
Find Deal
Thu, Aug 28 - Sat, Sep 6
Air Canada Logo
6:10 am - 3:28 pmYXU-SFO
12h 18m2 stops
Air Canada Logo
4:35 pm - 9:19 amSFO-YXU
13h 44m2 stops
$309Air Canada
Find Deal
Wed, Sep 10 - Tue, Sep 23
United Airlines Logo
6:10 am - 2:38 pmYXU-LAS
11h 28m3 stops
United Airlines Logo
6:28 pm - 9:19 amLAS-YXU
11h 51m2 stops
$438United Airlines
Find Deal
Sat, Sep 20 - Mon, Sep 22
United Airlines Logo
3:50 pm - 11:54 pmYXU-LAS
11h 04m2 stops
United Airlines Logo
12:59 am - 3:17 pmLAS-YXU
11h 18m2 stops
$439United Airlines
Find Deal
Thu, Sep 18 - Sun, Sep 21
Delta Logo
6:00 am - 11:56 amYXU-SFO
8h 56m1 stop
Delta Logo
7:30 am - 7:07 pmSFO-YXU
8h 37m1 stop
$1,034Delta
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Fri, Aug 29 - Fri, Sep 5
Delta Logo
6:00 am - 3:55 pmYXU-SFO
12h 55m2 stops
Delta Logo
6:05 pm - 5:12 amSFO-YXU
8h 07m1 stop
$1,286Delta
Find Deal
Fri, Aug 29 - Fri, Sep 5

United Airlines flights from London, Ontario to United States

Our best United Airlines deals on London, Ontario to United States flight tickets
United Airlines
Sep 20
YXU6:10 amLondon
11h 28m
3 stops
LAS2:38 pmLas Vegas Harry Reid Intl
Sep 22
LAS6:28 pmLas Vegas Harry Reid Intl
11h 51m
2 stops
YXU9:19 amLondon
$438
Find similar
United Airlines
Sep 18
YXU3:50 pmLondon
11h 04m
2 stops
LAS11:54 pmLas Vegas Harry Reid Intl
Sep 21
LAS12:59 amLas Vegas Harry Reid Intl
11h 18m
2 stops
YXU3:17 pmLondon
$439
Find similar
United Airlines
Sep 18
YXU3:50 pmLondon
11h 54m
2 stops
LAS12:44 amLas Vegas Harry Reid Intl
Sep 21
LAS12:59 amLas Vegas Harry Reid Intl
11h 18m
2 stops
YXU3:17 pmLondon
$440
Find similar

Air Canada flights from London, Ontario to United States

Our best Air Canada deals on London, Ontario to United States flight tickets
Air Canada
Sep 10
YXU3:50 pmLondon
8h 03m
1 stop
SFO8:53 pmSan Francisco
Sep 23
SFO4:35 pmSan Francisco
13h 44m
2 stops
YXU9:19 amLondon
$304
Find similar
Air Canada
Sep 10
YXU6:10 amLondon
12h 18m
2 stops
SFO3:28 pmSan Francisco
Sep 23
SFO4:35 pmSan Francisco
13h 44m
2 stops
YXU9:19 amLondon
$309
Find similar
Air Canada
Sep 10
YXU3:50 pmLondon
8h 03m
1 stop
SFO8:53 pmSan Francisco
Sep 23
SFO7:25 amSan Francisco
11h 04m
1 stop
YXU9:29 pmLondon
$323
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from London, Ontario to United States that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 31, 2025.
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

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 9/10

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Tue 9/23

7:30 am-7:07 pm

1 stop8h 37m

$286

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 9/10

6:00 am-11:54 am

1 stop8h 54m

San Francisco

Tue 9/23

10:15 am-5:12 am

3 stops15h 57m

$303

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 9/10

3:50 pm-8:53 pm

1 stop8h 03m

San Francisco

Tue 9/23

4:35 pm-9:19 am

2 stops13h 44m

$304

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/28

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Sat 9/6

2:45 pm-5:12 am

2 stops11h 27m

$305

LondonSan Francisco

YXU - SFO

YXUSFO

London

Thu 8/28

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Sat 9/6

7:30 am-7:07 pm

1 stop8h 37m

$308

LondonSan Francisco

YXU - SFO

YXUSFO

London

Wed 9/10

6:10 am-3:28 pm

2 stops12h 18m

San Francisco

Tue 9/23

4:35 pm-9:19 am

2 stops13h 44m

$309

LondonLas Vegas

YXU - LAS

YXULAS

London

Sat 9/20

6:10 am-2:38 pm

3 stops11h 28m

Las Vegas Harry Reid Intl

Mon 9/22

6:28 pm-9:19 am

2 stops11h 51m

$438

LondonLas Vegas

YXU - LAS

YXULAS

London

Thu 9/18

3:50 pm-11:54 pm

2 stops11h 04m

Las Vegas Harry Reid Intl

Sun 9/21

12:59 am-3:17 pm

2 stops11h 18m

$439

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 8/29

6:00 am-11:56 am

1 stop8h 56m

San Francisco

Fri 9/5

7:30 am-7:07 pm

1 stop8h 37m

$1,034

LondonSan Francisco

YXU - SFO

YXUSFO

London

Fri 8/29

6:00 am-3:55 pm

2 stops12h 55m

San Francisco

Fri 9/5

6:05 pm-5:12 am

1 stop8h 07m

$1,286

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to the United States from

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

What is the cheapest month to fly to United States?

In general, March is the cheapest month to fly from London, Ontario to United States. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $438. If you aren’t able to travel during the month of March, then book flights to United States from London, Ontario during November instead. Flights to United States in November, while not as cheap as those in March, still average around $439.

What is the cheapest day to depart on your flight to United States?

According to our data, Saturday is the cheapest day to fly to United States from London, Ontario. The lowest ticket price found for a Saturday departure recently was $353. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Friday because tickets tend to average around $439. These prices are subject to change though, so be sure to set up a Price Alert for flights to United States.

What is the cheapest time of day to depart on your flight to United States?

The cheapest time of day to fly to United States is in the morning when flights can be purchased for as low as $408. Try not to purchase tickets at noon because they tend to be around $482. Of course, these prices can vary depending on the time of year and what airport you fly to.

What is the cheapest London to United States flight route?

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

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

There are 1 cabin classes available to choose from on London to United States 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 London, Ontario to United States flights?

You could potentially save up to 9% 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

Best Price Found

$155

Fastest flight time

3h 29m

Direct flights

None

Airports in United States

9 airports
The best one-way flight to United States from London, Ontario in the past 72 hours is $155. The best round-trip flight deal from London, Ontario to United States found on momondo in the last 72 hours is $286.
The fastest flight from London, Ontario to United States takes 3h 29m
There are no direct flights from London, Ontario to United States. Popular non-direct routes for this connection are London Airport - Las Vegas Harry Reid Intl Airport, London Airport - Los Angeles Airport and London Airport - San Francisco Airport.
There are 9 airports near United States: Chicago O'Hare Intl (ORD), Newark (EWR), Los Angeles (LAX), Miami (MIA), New York LaGuardia (LGA), Orlando (MCO), San Francisco (SFO), New York John F Kennedy Intl (JFK), Las Vegas Harry Reid Intl (LAS)
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  • 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?

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

    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 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?

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
Flair AirlinesPriceFrom $140Free CancellationRating
6.0
247 reviews
Search Flair Airlines flights
Air CanadaPriceFrom $222Free CancellationRating
7.1
9,851 reviews
Search Air Canada flights

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from London to United States. Millions of users trust and use momondo every year so you are in good hands.

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

All flight searches from London to United States on momondo can be filtered to show those which offer flexible booking policies.

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

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

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

Price alerts on flights to United States from London are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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