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Cheap flights from San Antonio to London Heathrow Airport from £192

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 Apr — 19 Apr1
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 March 2026.

Fri 4/912:15
SAT
-
LHR
2 stops39h 05m
Scandinavian Airlines
Mon 7/906:40
LHR
-
SAT
2 stops22h 38m
Scandinavian Airlines
Deal found 9/3£485
Tue 18/817:24
SAT
-
LHR
2 stops17h 16m
Multiple Airlines
Thu 20/808:30
LHR
-
SAT
2 stops18h 46m
Multiple Airlines
Deal found 9/3£536
Tue 3/1116:10
SAT
-
LHR
2 stops19h 30m
Scandinavian Airlines
Tue 10/1106:40
LHR
-
SAT
2 stops22h 38m
Scandinavian Airlines
Deal found 8/3£539
Tue 1/1206:45
SAT
-
LHR
1 stop17h 40m
Delta
Tue 8/1208:40
LHR
-
SAT
2 stops18h 52m
Delta
Deal found 9/3£540
Tue 1/1207:30
SAT
-
LHR
1 stop21h 20m
United Airlines
Tue 8/1206:35
LHR
-
SAT
2 stops19h 31m
United Airlines
Deal found 8/3£542
Wed 12/813:44
SAT
-
LHR
2 stops16h 06m
Multiple Airlines
Wed 19/806:55
LHR
-
SAT
2 stops20h 18m
Multiple Airlines
Deal found 8/3£546
Mon 14/913:45
SAT
-
LHR
1 stop16h 35m
United Airlines
Fri 18/914:05
LHR
-
SAT
2 stops32h 03m
United Airlines
Deal found 9/3£548

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 March 2026.

Round-trip from

£485

One-way from

£192

Popular in

June

Cheapest in

October

Average price

£672
Scandinavian Airlines
  • Scandinavian Airlines
  • 4/9-7/9
  • 4 total stops
  • 61h 43m total
  • San Antonio to London
Search Deals
Delta
  • Delta
  • 1/9
  • 1 total stop
  • 12h 35m total
  • San Antonio to London
Search Deals
Highest demand for flights based on searches. 19% potential increase in price (£117 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 March 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 March 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
Fastest return journey

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 23/8

13:45-12:20

1 stop16h 35m

London Heathrow

Thu 27/8

13:40-21:16

1 stop13h 36m

£562

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 19/4

08:00-11:20

1 stop21h 20m

London Heathrow

Thu 30/4

08:40-20:30

2 stops17h 50m

£585

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 13/4

13:42-09:15

1 stop13h 33m

London Heathrow

Tue 28/4

11:45-00:46

2 stops19h 01m

£622

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 22/4

13:32-14:25

1 stop18h 53m

London Heathrow

Sat 2/5

08:55-18:42

1 stop15h 47m

£643

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 10/4

05:10-07:10

1 stop20h 00m

London Heathrow

Tue 14/4

20:05-12:17

1 stop22h 12m

£643

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 20/4

13:15-08:50

1 stop13h 35m

London Heathrow

Sun 26/4

11:30-23:08

2 stops17h 38m

£666

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 22/4

15:33-21:20

3 stops23h 47m

London Heathrow

Sat 2/5

06:40-00:46

2 stops24h 06m

£675
Cheapest one-way

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 1/9

08:53-06:55

2 stops16h 02m

£193

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 19/7

14:51-11:20

2 stops14h 29m

£211

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 1/9

14:00-09:15

1 stop13h 15m

£211

Flights are sorted by cheapest return flights first.

Deals found on 8/3

Showing 1-10 of 16 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?

Use this chart to determine the optimal time to book a return flight from San Antonio to Heathrow. Price data was last updated on 6 March 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 £393). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £611). 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 35m. United Airlines provides one of the quickest options available for as low as £562. 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 £393). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £611). 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
Wembley
Croydon
Northampton
Luton
Hounslow
Slough
Gatwick
Ilford
Hayes
Brentford
Colchester
Guildford
Watford
Kingston upon Thames
Chelmsford
Eastbourne
Ipswich
Swindon
Bedford

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

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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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