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Cheap flights from San Antonio to London Heathrow Airport from £213

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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
12 Jun — 19 Jun1
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 13 May 2026.

Mon 16/1116:20
SAT
-
LHR
2 stops22h 15m
United Airlines
Wed 18/1109:30
LHR
-
SAT
2 stops17h 37m
United Airlines
Deal found 8/5£559
Wed 30/1215:00
SAT
-
LHR
1 stop15h 00m
Iberia
Thu 14/107:30
LHR
-
SAT
2 stops19h 19m
Iberia
Deal found 11/5£644
Wed 21/1018:30
SAT
-
LHR
1 stop11h 45m
Iberia
Tue 27/1007:30
LHR
-
SAT
2 stops19h 13m
Iberia
Deal found 12/5£644
Wed 30/1214:10
SAT
-
LHR
1 stop12h 50m
Delta
Wed 13/111:45
LHR
-
SAT
2 stops17h 35m
Delta
Deal found 12/5£646
Mon 2/1114:10
SAT
-
LHR
2 stops21h 30m
Scandinavian Airlines
Mon 16/1106:40
LHR
-
SAT
2 stops21h 47m
Scandinavian Airlines
Deal found 11/5£647
Wed 12/810:46
SAT
-
LHR
2 stops14h 24m
Delta
Wed 19/808:40
LHR
-
SAT
2 stops18h 49m
Delta
Deal found 11/5£649
Sun 15/1112:15
SAT
-
LHR
2 stops27h 25m
Scandinavian Airlines
Tue 1/1210:20
LHR
-
SAT
2 stops18h 58m
Scandinavian Airlines
Deal found 10/5£652
Tue 18/806:00
SAT
-
LHR
2 stops18h 30m
Air Canada
Wed 26/814:10
LHR
-
SAT
2 stops26h 49m
Air Canada
Deal found 10/5£653
Mon 24/809:07
SAT
-
LHR
2 stops15h 48m
United Airlines
Tue 1/909:30
LHR
-
SAT
2 stops17h 22m
United Airlines
Deal found 8/5£654

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 13 May 2026.

Round-trip from

£644

One-way from

£213

Popular in

June

Cheapest in

October

Average price

£728
Iberia
  • Iberia
  • 27/10-4/11
  • 3 total stops
  • 29h 11m total
  • San Antonio to London
Search Deals
Virgin Atlantic
  • Virgin Atlantic
  • 1/9
  • 1 total stop
  • 16h 10m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£120 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 13 May 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

Wed 12/8

12:05-11:20

1 stop17h 15m

London Heathrow

Wed 19/8

08:40-21:14

2 stops18h 34m

£646

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/9

12:10-10:20

1 stop16h 10m

London Heathrow

Tue 22/9

06:30-17:09

2 stops16h 39m

£646

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/9

05:30-06:25

1 stop18h 55m

London Heathrow

Sun 20/9

06:30-17:16

2 stops16h 46m

£683

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 2/10

12:50-11:20

2 stops16h 30m

London Heathrow

Wed 14/10

09:55-21:32

2 stops17h 37m

£686
Fastest return journey

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 24/8

18:04-13:05

1 stop13h 01m

London Heathrow

Sun 6/9

15:15-00:15

1 stop15h 00m

£704

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 12/9

16:13-21:20

2 stops23h 07m

London Heathrow

Sat 19/9

13:40-21:16

1 stop13h 36m

£704

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 25/8

10:46-07:15

1 stop14h 29m

London Heathrow

Sun 6/9

15:15-00:15

1 stop15h 00m

£704

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 10/9

08:53-06:55

2 stops16h 02m

London Heathrow

Tue 22/9

09:30-22:38

2 stops19h 08m

£707

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 14/8

05:05-07:10

1 stop20h 05m

London Heathrow

Tue 18/8

09:55-21:14

2 stops17h 19m

£726
Cheapest one-way

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 8/9

10:45-06:25

1 stop13h 40m

£245

Flights are sorted by cheapest return flights first.

Deals found on 11/5

Showing 1-10 of 21 resultsSorted by cheapest first
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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?

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 £446). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £949). 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 17h 15m. Delta provides one of the quickest options available for as low as £646. 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 £446). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £949). 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
Hounslow
Croydon
Wembley
Northampton
Luton
Gatwick
Slough
Ilford
Hayes
Brentford
Colchester
Romford
Watford
Kingston upon Thames
Eastbourne
Swindon
Ipswich
Southend-on-Sea
Guildford

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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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