Cheap flights from London to Ontario, CA

Flights starting at £309. Choose between Frontier Airlines, United Airlines, or Norse Atlantic Airways to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals

Kiwi-Code uncovers prices airlines don't want you to see.

Effortless booking

Use our flexible filters to tailor your search.

Travel hacking

Look out for the travel hack star icon for even cheaper fares.

Tips to know when travelling to Ontario

Mailbox
Receive exclusive deals by email

By subscribing you agree to receive offers according to the conditions described in our Privacy Policy.

Travelers usually depart from Heathrow, Gatwick, London Stansted, Luton, or London City when they travel from London to Ontario. Book your trip to arrive at Ontario International, Ontario Bus Stop, Ontario, CA station, or Montclair (Ontario). The most popular airlines for this route are Frontier Airlines, United Airlines, Norse Atlantic Airways, Ryanair, and Delta Air Lines. London and Ontario have 362 direct flights per week.

Check-in for a flight from London to Ontario

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
United AirlinesUALUAYesNo
Norse Atlantic AirwaysNBTN0YesOpens 24 days before flight
Closes 2 hours before flight
RyanairRYRFRNoOpens 24 days before flight
Closes 2 hours before flight
Delta Air LinesDALDLYesOpens 24 days before flight
Closes 1 hours before flight

United States COVID-19 travel restrictions

Kiwi.com

Latest COVID-19 restrictions

United States

Kiwi.com/COVID-19/United States
  • Travel is allowed with restrictions for vaccinated travelers
  • No proof of negative pre-departure COVID-19 test results or recovery certificate is required for United States
  • No quarantine is required for vaccinated travelers
Latest COVID-19 travel restrictions in United States – 09/2022
Your trip summary

Most travelers from London, LHR can enter Ontario, ONT, but there are restrictions.

Departure

Travel restrictions
  • Travel is allowed with restrictions for vaccinated travelers
  • No proof of negative pre-departure COVID-19 test results or recovery certificate is required for United States
  • No quarantine is required for vaccinated travelers
Visa requirements
  • Electronic Travel Authorization (ESTA)
Forms and documents
  • Mandatory proof of COVID-19 vaccination is required for United States
  • Mandatory travel attestation form

Return

Travel restrictions
  • Travel is allowed
  • No proof of a negative pre-departure COVID-19 test is required
  • No quarantine is required
Visa requirements
  • Electronic Travel Authorization (ESTA)

Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.

Learn more about COVID-19 restrictions in United States in our dedicated Stories article.

Frequently asked questions

What are the most popular routes to and from London?
Travelers frequently search for route combinations, such as London and Lisbon, Istanbul, Athens, Tirana, Faro, Bucharest, Málaga, Larnaca, New York, Dubai, Tenerife, Alicante, Rome, Milan, Barcelona, Dublin, Amsterdam, Palma, Majorca, Tel Aviv, Madrid.
What are the most popular routes to and from Ontario?
Travelers frequently search for route combinations, such as Ontario and New York, Bangkok, San Francisco, Denver, Sacramento, Taipei, Manila, Toronto, Calgary, Seattle, Las Vegas, San Jose, Orlando, Houston, Macau, Los Angeles, Washington, D.C., Manchester, Detroit, Guadalajara.
Which airports are there in London?
London is mainly served by Heathrow. But there are other airports nearby, including Gatwick, London Stansted, Luton, London City, London Southend, RAF Northolt.
What airports are near London?
The main airport in London is Heathrow. It is also served by Birmingham, Bristol, East Midlands, Cardiff, Bournemouth, Doncaster Sheffield, Southampton, Exeter, Norwich, Humberside.
What airports are near Ontario?
The main airport in Ontario is Ontario International. It is also served by San Diego International, Ontario International, Tijuana International, John Wayne, Hollywood Burbank, Palm Springs International, Santa Barbara Municipal, Meadows Field, Imperial County, McClellan–Palomar.
What buses and trains depart from London?
A number of bus and train companies depart from London, including National Express.
Is it possible to combine flights, buses, and trains in one itinerary when traveling between London and Ontario?
Yes, it's possible to combine different modes of transport between London and Ontario thanks to our Virtual Interlining technology. Making use of not only flights but also trains and buses between London and Ontario can give rise to new adventures. Read more about how Virtual Interlining works on Kiwi.com Stories.
What is Virtual Interlining and how do I use it?
Virtual Interlining provides a revolutionary way of traveling. You can combine different modes of transport like flights, trains, and buses into one itinerary. And this often saves money. Thanks to the world's largest carrier database, the Kiwi.com search function enables anyone to mix and match different modes of transport easily.
Which airlines fly between London and Ontario?
Currently, you can fly between London and Ontario with Frontier Airlines, United Airlines, Norse Atlantic Airways, Ryanair, Delta Air Lines.
When's the best time to travel between London and Ontario?
What flights operate between London and Ontario?
How many airports are there near London?
How many airports are there near Ontario?
Is it possible to reach London by bus or train?
What time do nonstop (direct) flights between London and Ontario depart?
What time do nonstop (direct) flights between London and Ontario arrive?
What time do flights between London and Ontario depart?
What time do flights between London and Ontario arrive?

Planning a trip? Thanks to our Virtual Interlining algorithm, we offer billions of route combinations between any A and any B in the world by plane, train, and bus. Find the cheapest routes and best deals for you, as well as the best dates on which to travel.

Explore alternative trips

Flights from London

Flights to Ontario

Popular routes

Find the best connection from London to Ontario

Search, compare, and book flights, trains, or buses to get there.

Search flights, trains & buses

We hack the system, you fly for less.