Cheap flights from California to London from $138
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to London departing on 7/29. 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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WestJet flights from California to London, Ontario
Our best WestJet deals on California to London, Ontario flight tickets
Air Canada flights from California to London, Ontario
Our best Air Canada deals on California to London, Ontario flight tickets
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How to get the cheapest flight ticket from California to London, Ontario
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 day to depart on your flight to London, Ontario?
According to our data, Thursday is the cheapest day to fly to London, Ontario from California. The lowest ticket price found for a Thursday departure recently was $492. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Be sure to avoid booking your departure on a Wednesday as prices are generally higher than usual. According to our data, the average ticket price to London, Ontario on Wednesday is $543.
What is the cheapest time of day to depart on your flight to London, Ontario?
In the evening is the cheapest time of day to fly from California to London, Ontario when you can find flight prices for as low as $338. Flying to London, Ontario in the evening is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to London, Ontario, so prices are often more expensive at around $568 per ticket.
What is the cheapest airline that flies from California to London?
WestJet, Air Canada, and Flair Airlines are the most popular carriers operating from California to London
What airlines fly to London, Ontario?
Air Canada, Porter Airlines and United Airlines are the top three most popular airlines that fly to London, Ontario from California according to our data. Air Canada is the first choice among our users, with 37% of people opting to fly with this airline when traveling to London, Ontario. Keep in mind that there are 7 different airlines that fly to London, Ontario on a routine basis, so you have a few additional options to choose from.
Cheap California to London, Ontario flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from California to London, Ontario
When did momondo last update prices for flights from California to London Airport?
Prices for flights from California to London Airport were last updated today.
How many operators does momondo search for flights from California to London Airport?
There are 3 operators available for flights from California to London Airport as of June 2025.
How old do you have to be to fly from California to London Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from California to London Airport.
What documentation or ID do you need to fly to London Airport?
The travel and health documents required for your trip to London Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at London Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from California to London, Ontario
Compare and see reviews for airlines that fly from California to London, Ontario with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $138 | Free Cancellation | Rating 7.1 9,554 reviews | |||
| PriceFrom $183 | Free Cancellation | Rating 7.4 8,801 reviews | |||
| PriceFrom $306 | Free Cancellation | Rating 7.2 2,873 reviews |
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Why should I use momondo to find a flight deal from California to London?
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 California to London for you.
Can I find flights from California to London with flexible booking policies on momondo?
Yes. All flights to London from California on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights from California to London?
Once you have performed a search for California to London 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 California to London right now. Can momondo alert me if prices change?
If you are simply researching potential flights to London, momondo offers a useful price alert feature which will track prices for flights to London from California and alert you when they change.