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Cheap flights from San Antonio to London Heathrow Airport from £163

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 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
25 Feb — 4 Mar1
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 26 January 2026.

Mon 5/1012:50
SAT
-
LHR
2 stops17h 00m
Multiple Airlines
Wed 7/1006:00
LHR
-
SAT
2 stops21h 00m
Multiple Airlines
Deal found 23/1£408
Mon 5/1010:00
SAT
-
LHR
3 stops18h 00m
Air Canada
Wed 7/1006:00
LHR
-
SAT
2 stops21h 00m
Air Canada
Deal found 23/1£410
Wed 25/217:25
SAT
-
LHR
2 stops16h 25m
Lufthansa
Wed 4/311:10
LHR
-
SAT
2 stops18h 02m
Lufthansa
Deal found 24/1£446
Mon 23/217:25
SAT
-
LHR
2 stops20h 10m
Lufthansa
Mon 2/308:30
LHR
-
SAT
2 stops17h 58m
Lufthansa
Deal found 25/1£453
Tue 12/517:29
SAT
-
LHR
2 stops18h 56m
Lufthansa
Wed 20/510:50
LHR
-
SAT
2 stops18h 04m
Lufthansa
Deal found 26/1£456
Tue 10/317:30
SAT
-
LHR
1 stop13h 10m
KLM
Tue 17/310:00
LHR
-
SAT
2 stops30h 30m
KLM
Deal found 24/1£459
Mon 2/315:08
SAT
-
LHR
1 stop15h 07m
British Airways
Wed 11/306:15
LHR
-
SAT
2 stops17h 55m
British Airways
Deal found 24/1£461
Mon 23/212:45
SAT
-
LHR
1 stop14h 25m
United Airlines
Mon 2/307:40
LHR
-
SAT
2 stops18h 48m
United Airlines
Deal found 26/1£462
Sun 22/208:00
SAT
-
LHR
1 stop16h 25m
Delta
Sat 7/308:40
LHR
-
SAT
2 stops19h 17m
Delta
Deal found 25/1£462
Tue 27/1017:00
SAT
-
LHR
2 stops19h 05m
Lufthansa
Wed 4/1111:10
LHR
-
SAT
2 stops17h 58m
Lufthansa
Deal found 26/1£463
Thu 5/305:30
SAT
-
LHR
1 stop18h 55m
Delta
Tue 17/308:40
LHR
-
SAT
2 stops31h 49m
Delta
Deal found 25/1£467
Sat 7/319:00
SAT
-
LHR
1 stop30h 30m
United Airlines
Tue 17/313:25
LHR
-
SAT
2 stops30h 39m
United Airlines
Deal found 25/1£468

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 26 January 2026.

Round-trip from

£446

One-way from

£163

Popular in

June

Cheapest in

October

Average price

£579
Lufthansa
  • Lufthansa
  • 4/3-17/3
  • 4 total stops
  • 41h 57m total
  • San Antonio to London
Search Deals
British Airways
  • British Airways
  • 26/4
  • 1 total stop
  • 13h 44m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 21% potential increase in price (£126 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£22 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 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 26 January 2026.
Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

Fly from

San Antonio

Fly to

Heathrow

Route

Depart

Return

Price

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 23/2

07:00-06:20

2 stops17h 20m

London Heathrow

Mon 2/3

07:40-20:28

2 stops18h 48m

£462

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 1/4

12:22-10:40

1 stop16h 18m

London Heathrow

Wed 8/4

08:40-22:42

2 stops20h 02m

£473

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 21/4

05:20-06:45

1 stop19h 25m

London Heathrow

Tue 28/4

08:40-21:30

2 stops18h 50m

£473

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/5

14:00-10:40

1 stop14h 40m

London Heathrow

Wed 20/5

08:40-21:28

2 stops18h 48m

£473

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 19/4

17:30-11:45

1 stop12h 15m

London Heathrow

Thu 30/4

14:05-16:19

2 stops32h 14m

£480

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 19/3

12:22-06:50

1 stop13h 28m

London Heathrow

Thu 26/3

11:20-23:29

1 stop17h 09m

£483

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 18/3

12:22-06:50

1 stop13h 28m

London Heathrow

Wed 25/3

15:50-00:38

1 stop13h 48m

£483

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 8/3

06:13-09:00

1 stop21h 47m

London Heathrow

Tue 17/3

08:55-20:30

1 stop16h 35m

£483

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 27/4

19:12-14:25

1 stop13h 13m

£163

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 9/5

06:49-06:30

2 stops41h 41m

£163

Flights are sorted by cheapest return flights first.

Deals found on 24/1

Showing 1-10 of 18 results
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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?

Use this chart to determine the optimal time to book a return flight from San Antonio to Heathrow. Price data was last updated on 23 January 2026.

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 29 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £386). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £613). 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.

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 16h 18m. United Airlines provides one of the quickest options available for as low as £473. The distance from San Antonio to London Heathrow Airport is about 4967 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £386). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £613). 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
Milton Keynes
Luton
Croydon
Wembley
Northampton
Gatwick
Slough
Hounslow
Ilford
Brentford
Hayes
Watford
Colchester
Guildford
Swindon
Chelmsford
Bedford
Crawley
Kingston upon Thames
Eastbourne

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for San Antonio to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
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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.

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