Find flights
When to book
FAQs

Cheap flights from San Antonio to London Heathrow Airport from £247

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 15/11. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
27 Jul — 3 Aug1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from San Antonio to Heathrow

Enter your travel dates to find the best prices.

Cheapest flights from San Antonio to Heathrow
Explore the most affordable flight options available from San Antonio to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 27 June 2026.

Tue 22/912:29
SAT
-
LHR
1 stop16h 31m
Virgin Atlantic
Fri 2/1009:20
LHR
-
SAT
1 stop13h 43m
Virgin Atlantic
Deal found 25/6£344
Mon 20/712:04
SAT
-
LHR
1 stop13h 11m
Virgin Atlantic
Mon 27/715:15
LHR
-
SAT
1 stop15h 05m
Virgin Atlantic
Deal found 23/6£348
Tue 29/1208:00
SAT
-
LHR
1 stop20h 00m
Virgin Atlantic
Fri 8/106:30
LHR
-
SAT
2 stops16h 48m
Virgin Atlantic
Deal found 24/6£351
Thu 24/918:10
SAT
-
LHR
1 stop13h 05m
Virgin Atlantic
Wed 30/909:20
LHR
-
SAT
1 stop15h 28m
Virgin Atlantic
Deal found 25/6£358
Thu 8/1012:10
SAT
-
LHR
1 stop12h 35m
Virgin Atlantic
Mon 12/1015:15
LHR
-
SAT
1 stop15h 13m
Virgin Atlantic
Deal found 23/6£379
Thu 3/916:49
SAT
-
LHR
1 stop18h 46m
Virgin Atlantic
Tue 8/911:15
LHR
-
SAT
1 stop13h 50m
Virgin Atlantic
Deal found 25/6£381
Tue 29/1212:50
SAT
-
LHR
1 stop13h 55m
Virgin Atlantic
Wed 6/106:30
LHR
-
SAT
2 stops16h 48m
Virgin Atlantic
Deal found 24/6£415

Find flight deals from San Antonio to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from San Antonio (SAT) to Heathrow (LHR). 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 27 June 2026.

Round-trip from

£344

One-way from

£247

Popular in

June

Cheapest in

October

Average price

£971
Virgin Atlantic
  • Virgin Atlantic
  • 22/9-2/10
  • 2 total stops
  • 30h 14m total
  • San Antonio to London
Search Deals
British Airways
  • British Airways
  • 15/11
  • 1 total stop
  • 12h 23m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 20% potential increase in price (£128 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in June 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from San Antonio to Heathrow 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 858,174 searches. Data last updated 27 June 2026.
Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 3/9

16:49-17:35

1 stop18h 46m

London Heathrow

Tue 8/9

11:15-19:05

1 stop13h 50m

£381

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 22/9

11:36-07:10

1 stop13h 34m

London Heathrow

Fri 2/10

09:40-21:18

2 stops17h 38m

£493

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 24/9

13:55-07:15

1 stop11h 20m

London Heathrow

Wed 30/9

13:40-00:10

2 stops16h 30m

£509

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 8/10

10:45-06:25

1 stop13h 40m

London Heathrow

Mon 12/10

13:40-00:28

2 stops16h 48m

£560

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 26/10

10:45-07:05

2 stops15h 20m

London Heathrow

Tue 10/11

08:40-21:32

2 stops18h 52m

£661

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/8

12:37-12:05

1 stop17h 28m

London Heathrow

Wed 19/8

06:30-18:46

2 stops18h 16m

£704

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 8/10

16:50-12:25

1 stop13h 35m

London Heathrow

Fri 16/10

08:30-21:13

1 stop18h 43m

£716
Fastest return journey

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 24/9

12:50-07:15

1 stop12h 25m

London Heathrow

Wed 30/9

12:05-21:13

1 stop15h 08m

£716

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 5/8

13:35-10:25

1 stop14h 50m

London Heathrow

Wed 19/8

12:05-21:13

1 stop15h 08m

£723

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 8/11

16:10-21:40

2 stops23h 30m

London Heathrow

Thu 12/11

07:05-23:18

3 stops22h 13m

£743

Flights are sorted by cheapest return flights first.

Deals found on 25/6

Showing 1-10 of 23 resultsSorted by cheapest first
1
2
3

Best time to book a flight from San Antonio to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from San Antonio with our price prediction graph.
Estimated return 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 San Antonio to London Heathrow Airport

How far ahead should I book a flight from San Antonio to London Heathrow Airport?

The price you pay for your flight from San Antonio to London Heathrow Airport may vary depending on when you book. For the best chance of a lower fare, look to book 75 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from San Antonio to London Heathrow Airport?

Currently, October is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £439). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £971). 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.

How much does it cost for a return flight from San Antonio to London Heathrow Airport?

Related info for your journey

Find useful and relevant information for your journey from San Antonio to Heathrow. 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 San Antonio to London Heathrow?

    San Antonio (SAT), located 7.6 mi from the city center, is the airport you fly out of when you book flights from San Antonio to London Heathrow. 0 airlines have flights from San Antonio to London Heathrow on a regular basis. Booking flights from San Antonio to London Heathrow should not be difficult; the airport handles an average of 0 outbound flights to London Heathrow per day.

  • How long is the flight from San Antonio to London Heathrow Airport?

    A quick flight from San Antonio to London Heathrow Airport can take about 18h 46m. Virgin Atlantic provides one of the quickest options available for as low as £381. The distance from San Antonio to London Heathrow Airport is about 4967 mi.

  • Can I find deals for flights from San Antonio to Heathrow that include hotel bookings?

    Yes. In addition to deals on San Antonio to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from San Antonio to Heathrow?

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

  • Can I find deals for business class flights from San Antonio to Heathrow?

    Yes. Cheapflights offers flight deals from San Antonio to Heathrow 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 San Antonio to London Heathrow Airport?

    Currently, October is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £439). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £971). 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 London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Hounslow
Milton Keynes
Wembley
Luton
Gatwick
Croydon
Ilford
Slough
Hayes
Brentford
Colchester
Northampton
Kingston upon Thames
Swindon
Eastbourne
Watford
Poole
Southall
Romford
Ipswich

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Fly with Cheapflights

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

How does Cheapflights help users find flights from San Antonio to Heathrow?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from San Antonio to Heathrow. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from San Antonio to Heathrow?

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from San Antonio to Heathrow for you. Better yet — we are completely free to use.

Can Cheapflights find flights from San Antonio to Heathrow with no change fees?

Yes! Cheapflights helps users easily find flights from San Antonio to Heathrow with no change fees.

Can Cheapflights notify me if prices for flights from San Antonio to Heathrow become cheaper?

Yes, Cheapflights offers price alerts on San Antonio to Heathrow flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.