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Cheap flights from London, ON to San Diego from C$ 617

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 25/12. Fares are subject to change and may not be available on all flights or dates of travel.
YXU — SAN
12 Dec — 19 Dec1
1 adult
1 adult, Economy, 0 bags

Find flight deals from London to San Diego

Enter your travel dates to find the best prices.

Cheapest flights from London to San Diego
Explore the most affordable flight options available from London to San Diego. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 November 2025.

Fri 28/115:15 a.m.YXU - SAN
2 stops15h 14mUnited Airlines
Tue 9/126:30 a.m.SAN - YXU
2 stops11h 51mUnited Airlines
Deal found 12/11C$ 979
Thu 25/125:10 a.m.YXU - SAN
2 stops20h 41mUnited Airlines
Fri 9/110:00 p.m.SAN - YXU
2 stops20h 21mUnited Airlines
Deal found 10/11C$ 1,001
Thu 25/125:10 a.m.YXU - SAN
2 stops20h 41mUnited Airlines
Fri 26/127:00 a.m.SAN - YXU
2 stops22h 46mUnited Airlines
Deal found 10/11C$ 1,077
Sun 21/129:25 a.m.YXU - SAN
2 stops28h 40mUnited Airlines
Fri 9/18:10 a.m.SAN - YXU
2 stops10h 11mUnited Airlines
Deal found 10/11C$ 1,122
Tue 23/125:40 p.m.YXU - SAN
2 stops21h 05mUnited Airlines
Fri 9/16:15 a.m.SAN - YXU
2 stops12h 06mUnited Airlines
Deal found 10/11C$ 1,171
Thu 25/125:10 a.m.YXU - SAN
1 stop9h 43mAir Canada
Fri 9/112:40 p.m.SAN - YXU
1 stop17h 06mAir Canada
Deal found 10/11C$ 1,213

Cheap flight deals from London to San Diego

Discover tips and strategies to find the most affordable flight options for your journey from London (YXU) to San Diego (SAN). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 12 November 2025.

Round-trip from

C$ 721

One-way from

C$ 617

Popular in

March

Cheapest in

January
United Airlines
  • United Airlines
  • 22/2-26/2
  • 4 total stops
  • 26h 16m total
  • London to San Diego
Search Deals
25/12
  • 25/12
  • 2 total stops
  • 20h 05m total
  • London to San Diego
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (C$ 171 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 8% potential price decrease (C$ 55 potential savings vs. average RT price).
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from London to San Diego 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 12 November 2025.
Use the filters below to find and compare flights from London to San Diego that are best for you.

Fly from

London

Fly to

San Diego

Route

Depart

Return

Price

LondonSan Diego

YXU - SAN

YXUSAN

London

Sun 22/2

5:40 p.m.-9:52 a.m.

2 stops19h 12m

San Diego

Thu 26/2

8:50 a.m.-9:21 p.m.

2 stops9h 31m

C$ 722

LondonSan Diego

YXU - SAN

YXUSAN

London

Fri 28/11

5:15 a.m.-5:29 p.m.

2 stops15h 14m

San Diego

Tue 9/12

6:30 a.m.-9:21 p.m.

2 stops11h 51m

C$ 979

LondonSan Diego

YXU - SAN

YXUSAN

London

Thu 25/12

5:10 a.m.-10:51 p.m.

2 stops20h 41m

San Diego

Fri 9/1

10:00 p.m.-9:21 p.m.

2 stops20h 21m

C$ 1,001

LondonSan Diego

YXU - SAN

YXUSAN

London

Sun 21/12

9:25 a.m.-11:05 a.m.

2 stops28h 40m

San Diego

Fri 9/1

8:10 a.m.-9:21 p.m.

2 stops10h 11m

C$ 1,122

LondonSan Diego

YXU - SAN

YXUSAN

London

Thu 25/12

8:10 p.m.-1:15 p.m.

2 stops20h 05m

C$ 617

LondonSan Diego

YXU - SAN

YXUSAN

London

Fri 26/12

5:10 a.m.-9:56 p.m.

2 stops19h 46m

C$ 697

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 17/11

8:10 p.m.-8:24 p.m.

2 stops51h 14m

C$ 791

LondonSan Diego

YXU - SAN

YXUSAN

London

Thu 25/12

5:10 a.m.-11:53 a.m.

1 stop9h 43m

C$ 836

LondonSan Diego

YXU - SAN

YXUSAN

London

Mon 17/11

5:15 a.m.-11:53 a.m.

1 stop9h 38m

C$ 1,485

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/11

Best time to book a flight from London to San Diego

Have a flexible travel schedule? Discover the best time to fly to San Diego 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 San Diego

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

Currently, July is the cheapest month in which you can book a flight from London, Ontario to San Diego (average of C$ 135). Flying from London, Ontario to San Diego in November is currently the most expensive (average of C$ 363). 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 SAN?

Find hourly flight availability from London to San Diego. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 12 November 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 52% on flights from London, Ontario to San Diego by exploring options for tickets in the evening.

Reviews of airlines servicing San Diego

Get insights into the airlines that provide service to San Diego. 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 San Diego. Reviews last updated 12 November 2025.
Check out reviews from past customers who have flown with United Airlines and Air Canada from London to San Diego 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
9,015 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
9,015 reviews
United Airlines
7.4
Good
9,015 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
Air Canada
7.1
Good
10,444 reviews
United Airlines
7.4
Good
9,015 reviews
Check prices

Overall

7.4

Comfort

7.3

Entertainment

7.1

Crew

8.1

Food

6.6

Boarding

7.7

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

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

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

    A quick flight from London, Ontario to San Diego can take about 19h 12m. Air Canada provides one of the quickest options available for as low as C$ 722. London, Ontario and San Diego are separated by a distance of 3331 km.

  • What are the cheapest airlines flying from London, Ontario to San Diego round-trip?

    Our cheapest airline available from London, Ontario to San Diego is Air Canada. Our recent data shows that you can find tickets from as low as C$ 330 on this airline. An additional option worth looking into is United Airlines, starting at C$ 356. Air Canada is currently priced 36% below the average price you’ll pay for this route.

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

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

  • How can I find direct flights from London to San Diego?

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

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

    Yes. Cheapflights offers flight deals from London to San Diego 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 San Diego?

    Currently, July is the cheapest month in which you can book a flight from London, Ontario to San Diego (average of C$ 135). Flying from London, Ontario to San Diego in November is currently the most expensive (average of C$ 363). 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

Travelling to a place near San Diego?

Book flights to San Diego if you plan to visit one of these locations
El Cajon
La Mesa
Borrego Springs

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Top 2 airlines flying from London to San Diego

Discover the top 2 airlines that operate flights from London to San Diego. 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 12 November 2025.
AirlineCheapestAverageFlexibilityOn-time
Air CanadaCheapestC$ 330AverageC$ 442FlexibilityNo cancel feeOn-time67%
Search Air Canada flights
United AirlinesCheapestC$ 356AverageC$ 424FlexibilityNo cancel feeOn-time69%
Search United Airlines 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 San Diego?

Cheapflights makes it easy to find London to San Diego flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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

Cheapflights helps you find that perfect flight to San Diego from London by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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

Yes, we can. To see specific flights from London to San Diego with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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