Ontario, CA to London, United Kingdom flights

Flights starting at £207. Choose between Frontier Airlines, Spirit Airlines, or WestJet to find the best price.

Make your travel wishlist, we'll do the rest
Hidden deals
Effortless booking
Travel hacking

One-way trips

Round trips

Ontario ONTSalt Lake City SLCSeattle SEAOntario ONT
£512
Explore the map
Mailbox
Receive exclusive deals by email
Travelers usually depart from Ontario International, Ontario Bus Stop, Ontario, CA station, or Montclair (Ontario) when they travel from Ontario to London. Book your trip to arrive at Gatwick, Heathrow, London Stansted, Luton, or London City. The most popular airlines for this route are Frontier Airlines, Spirit Airlines, WestJet, Ryanair, and United Airlines. Ontario and London have 401 direct flights per week. When you arrive at London, consider visiting St. Paul's Cathedral, Canterbury Cathedral, Portsea Island, Tower of London, British Museum, Avebury, Natural History Museum, Isle of Wight, Roman Baths, Bath, Stonehenge, and Tate Modern.

Check-in for a flight from Ontario to London

NameCarrier codeIATA CodePassport needed during bookingOnline check-in available
Frontier AirlinesFFTF9NoOpens 24 days before flight
Closes 1 hours before flight
Spirit AirlinesNKSNKNoOpens 24 days before flight
Closes 1 hours before flight
WestJetWJAWSNoOpens 24 days before flight
Closes 1 hours before flight
RyanairRYRFRNoOpens 24 days before flight
Closes 2 hours before flight
United AirlinesUALUAYesNo

United Kingdom COVID-19 travel restrictions

Your trip summary

Departure

Travel restrictions
  • Travel is allowed
  • Proof of pre-departure COVID-19 test is not required
  • Quarantine is not required
Visa requirements
  • Visa is not required
Additional information
  • Masks are recommended in certain situations

Return

Travel restrictions
  • Travel is allowed
  • Proof of pre-departure COVID-19 test is not required
  • Quarantine is not required
Visa requirements
  • Visa is not required

Frequently asked questions

What are the most popular routes to and from Ontario?
What are the most popular routes to and from London?
What airports are near Ontario?
What airports are near London?
Is it possible to combine flights, buses, and trains in one itinerary when traveling between Ontario and London?
What is Virtual Interlining and how do I use it?
Which airlines fly between Ontario and London?
When's the best time to travel between Ontario and London?
What flights operate between Ontario and London?
How many airports are there near Ontario?
How many airports are there near London?
What time do nonstop (direct) flights between Ontario and London depart?
What time do nonstop (direct) flights between Ontario and London arrive?
What time do flights between Ontario and London depart?
What time do flights between Ontario and London arrive?

Explore alternative trips

Flights from Ontario

Flights to London

Popular routes

Find the best connection from Ontario to London
Search flights, trains & buses

We hack the system,
you fly for less