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Cheap flights from London, ON to the United States from C$ 275

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 31/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — LAX
22 Jan — 29 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from London to USA

Enter your travel dates to find the best prices.

Cheapest flights from London to USA
Explore the most affordable flight options available from London to USA. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 23 December 2025.

Wed 31/125:40 p.m.YXU - MCO
1 stop5h 50mAir Canada
Thu 8/110:20 a.m.MCO - YXU
1 stop6h 45mAir Canada
Deal found 21/12C$ 494
Wed 31/125:10 a.m.YXU - MCO
2 stops9h 02mAir Canada
Wed 7/18:30 a.m.MCO - YXU
2 stops8h 35mAir Canada
Deal found 21/12C$ 518
Wed 31/125:40 p.m.YXU - MCO
1 stop5h 50mAir Canada
Tue 6/110:00 p.m.MCO - YXU
1 stop10h 46mAir Canada
Deal found 21/12C$ 555
Tue 30/125:10 a.m.YXU - MCO
2 stops11h 56mUnited Airlines
Wed 7/110:16 a.m.MCO - YXU
2 stops11h 05mUnited Airlines
Deal found 21/12C$ 595
Mon 29/125:10 a.m.YXU - MCO
2 stops16h 31mAir Canada
Thu 8/110:20 a.m.MCO - YXU
1 stop6h 45mAir Canada
Deal found 21/12C$ 604
Tue 30/125:40 p.m.YXU - MCO
2 stops20h 32mAir Canada
Tue 6/110:00 p.m.MCO - YXU
1 stop10h 46mAir Canada
Deal found 21/12C$ 655
Mon 29/125:10 a.m.YXU - MCO
2 stops16h 31mAir Canada
Tue 6/110:00 p.m.MCO - YXU
1 stop10h 46mAir Canada
Deal found 21/12C$ 665
Sun 28/125:10 a.m.YXU - MCO
2 stops15h 02mUnited Airlines
Wed 7/112:15 p.m.MCO - YXU
2 stops9h 06mUnited Airlines
Deal found 21/12C$ 699
Sun 28/125:10 a.m.YXU - MIA
2 stops17h 30mUnited Airlines
Thu 1/18:45 a.m.MIA - YXU
2 stops12h 36mUnited Airlines
Deal found 20/12C$ 960
Tue 23/129:25 a.m.YXU - MIA
2 stops11h 57mAir Canada
Sun 28/127:25 a.m.MIA - YXU
1 stop13h 56mAir Canada
Deal found 21/12C$ 1,187
Tue 30/125:40 p.m.YXU - ORD
1 stop5h 25mUnited Airlines
Fri 2/19:05 a.m.ORD - YXU
2 stops11h 16mUnited Airlines
Deal found 21/12C$ 1,192
Wed 24/125:10 a.m.YXU - LGA
2 stops9h 32mAir Canada
Fri 2/111:30 a.m.LGA - YXU
1 stop5h 35mAir Canada
Deal found 21/12C$ 1,245

Find flight deals from London to USA

Keep the following information in mind while searching for London to USA flight deals. Data was last updated 23 December 2025.

Round-trip from

C$ 447

One-way from

C$ 275

Popular in

December

Cheapest in

April

Average price

C$ 650
WestJet
  • WestJet
  • 4/2-11/2
  • 4 total stops
  • 41h 31m total
  • London to USA
Search Deals
Air Canada
  • Air Canada
  • 31/12
  • 1 total stop
  • 5h 50m total
  • London to USA
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (C$ 22 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (C$ 15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to USA 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, Cheapflights users made 629,999 searches. Data last updated 23 December 2025.
Use the filters below to find and compare flights from London to the United States that are best for you.

Fly from

London

Fly to

USA

Route

Depart

Return

Price

LondonLas Vegas

YXU - LAS

YXULAS

London

Wed 4/2

8:10 p.m.-8:16 p.m.

2 stops27h 06m

Las Vegas Harry Reid Intl

Wed 11/2

1:10 p.m.-6:35 a.m.

2 stops14h 25m

C$ 447

LondonLas Vegas

YXU - LAS

YXULAS

London

Tue 31/3

8:10 p.m.-12:19 p.m.

2 stops19h 09m

Las Vegas Harry Reid Intl

Tue 7/4

7:05 p.m.-6:35 a.m.

1 stop8h 30m

C$ 475

LondonTampa

YXU - TPA

YXUTPA

London

Fri 10/4

9:25 a.m.-9:01 p.m.

2 stops11h 36m

Tampa

Tue 14/4

4:05 p.m.-9:18 p.m.

1 stop5h 13m

C$ 508

LondonOrlando

YXU - MCO

YXUMCO

London

Tue 13/1

5:40 p.m.-11:50 p.m.

1 stop6h 10m

Orlando

Thu 22/1

8:30 a.m.-9:21 p.m.

2 stops12h 51m

C$ 508

LondonOrlando

YXU - MCO

YXUMCO

London

Sun 11/1

5:10 a.m.-5:07 p.m.

2 stops11h 57m

Orlando

Thu 22/1

10:20 a.m.-5:05 p.m.

1 stop6h 45m

C$ 508

LondonTampa

YXU - TPA

YXUTPA

London

Fri 10/4

9:25 a.m.-9:01 p.m.

2 stops11h 36m

Tampa

Mon 20/4

12:00 p.m.-9:18 p.m.

2 stops9h 18m

C$ 512

LondonTampa

YXU - TPA

YXUTPA

London

Fri 10/4

9:25 a.m.-9:01 p.m.

2 stops11h 36m

Tampa

Sun 19/4

12:00 p.m.-9:18 p.m.

2 stops9h 18m

C$ 512

LondonDallas

YXU - DFW

YXUDFW

London

Tue 20/1

8:10 p.m.-6:31 p.m.

2 stops23h 21m

Dallas/Fort Worth

Tue 27/1

11:37 a.m.-6:34 a.m.

2 stops17h 57m

C$ 523

LondonTampa

YXU - TPA

YXUTPA

London

Fri 10/4

9:25 a.m.-9:01 p.m.

2 stops11h 36m

Tampa

Tue 21/4

4:05 p.m.-9:18 p.m.

1 stop5h 13m

C$ 527

LondonTampa

YXU - TPA

YXUTPA

London

Fri 10/4

9:25 a.m.-9:01 p.m.

2 stops11h 36m

Tampa

Fri 17/4

4:05 p.m.-9:18 p.m.

1 stop5h 13m

C$ 527

Flights are sorted by cheapest round-trip flights first.

Deals found on 21/12

Showing 1-10 of 60 results
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Best time to book a flight from London to USA

Have a flexible travel schedule? Discover the best time to fly to USA from London with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London to the United States

What is the cheapest month to book a flight from London, Ontario to USA?

Currently, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 89). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from YXU to US?

Find hourly flight availability from London to USA. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 23 December 2025.

It’s typically best to fly out from London, Ontario to USA in the evening. Doing so could potentially save you 31% on the flight price compared to flying in the morning, which is usually more expensive.

What is the cheapest day to fly from London, Ontario to USA?

Use this chart to determine the cheapest time to fly round-trip from London to USA. Price data was last updated on 16 December 2024.

Travelers seeking maximum savings on their London, Ontario to USA flight should consider departing on Tuesday mornings when fares are most often at their lowest. Sunday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing USA

Get insights into the airlines that provide service to USA. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to USA. Reviews last updated 23 December 2025.
Check out reviews from past customers who have flown with United Airlines,WestJet, andAir Canada from London to the United States to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,105 reviews
Check prices

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,105 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
WestJet
7.2
Good
3,214 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Air Canada
7.1
Good
10,551 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Flair Airlines
6.0
Okay
256 reviews
United Airlines
7.4
Good
9,105 reviews
Check prices

Overall

7.4

Boarding

7.7

Comfort

7.3

Crew

8.1

Entertainment

7.1

Food

6.6

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from London to USA. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from London to United States?

    Located just 8.6 km from the city centre, London (YXU) is the airport most travellers will use when flying to United States from London.

  • How long is the flight from London, Ontario to USA?

    Departing from London, Ontario to USA will take you 11h 36m. London, Ontario and USA are separated by a distance of 1677 km. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from London, Ontario to USA one-way?

    The cheapest airline one-way is Flair Airlines, with whom users have recently found tickets for as low as C$ 101. However, be on the lookout for offers from Air Canada and WestJet, as they are both options that can get you from London, Ontario to USA for a low price.

  • What are the most popular routes from London, Ontario to USA?

    The most popular route from London, Ontario to USA is London - Orlando. You may also consider London - Dallas/Fort Worth or London - New York LaGuardia.

  • Can I find deals for flights from London to USA that include hotel bookings?

    Yes. In addition to deals on London to USA flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from London to USA?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to USA.

  • Can I find deals for business class flights from London to USA?

    Yes. Cheapflights offers flight deals from London to USA by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London, Ontario to USA?

    Currently, April is the cheapest month in which you can book a flight from London, Ontario to USA (average of C$ 89). Flying from London, Ontario to USA in December is currently the most expensive (average of C$ 171). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to USA

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from London to USA

Discover the top 4 airlines that operate flights from London to USA. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 629,999 searches. Data last updated 23 December 2025.
AirlineCheapestAverageFlexibilityOn-time
Flair AirlinesCheapestC$ 157AverageC$ 224FlexibilityNo cancel feeOn-timeN/A
Search Flair Airlines flights
United AirlinesCheapestC$ 178AverageC$ 548FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
WestJetCheapestC$ 241AverageC$ 400FlexibilityNo cancel feeOn-time60%
Search WestJet flights
Air CanadaCheapestC$ 304AverageC$ 639FlexibilityNo cancel feeOn-time67%
Search Air Canada flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travelers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from London to USA?

Cheapflights helps you search for flights from London to USA via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from London to USA?

Cheapflights simply makes it quick and affordable to book flights from London to USA by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from London to USA with no change fees?

Users can book flights with no change fees policies with our dedicated filters. Book flights from London to USA flexibly with Cheapflights today.

Can Cheapflights notify me if prices for flights from London to USA become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to USA from London today and book when prices fit your budget.

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