Cheap flights from San Antonio to London Heathrow Airport from £197
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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 37 days in advance, depart on a Monday or Tuesday and return on a Saturday
Cheap 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 2 September 2025.
Round-trip from | £378 |
---|---|
One-way from | £197 |
Popular in | December |
Cheapest in | October |
Average price | £598 |
Find flight deals from San Antonio to Heathrow
Cheapest flights from San Antonio to HeathrowExplore 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 2 September 2025.
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 2 September 2025.
Cheapflights Fare Finder
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
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 11/2
14:36-10:00
1 stop13h 24m
London Heathrow
Wed 18/2
19:40-08:27
2 stops18h 47m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Tue 4/11
12:55-06:50
1 stop11h 55m
London Heathrow
Thu 20/11
14:10-21:57
1 stop13h 47m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Mon 22/9
06:35-07:15
1 stop18h 40m
London Heathrow
Fri 3/10
11:30-22:19
2 stops16h 49m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Tue 4/11
12:02-06:20
1 stop12h 18m
London Heathrow
Thu 20/11
06:20-17:20
2 stops17h 00m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 24/9
12:15-13:30
1 stop19h 15m
London Heathrow
Tue 30/9
11:45-23:59
2 stops18h 14m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 19/11
13:40-07:20
1 stop11h 40m
London Heathrow
Wed 3/12
14:10-22:00
1 stop13h 50m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Sun 26/10
18:39-12:15
1 stop12h 36m
London Heathrow
Wed 5/11
10:05-18:58
1 stop14h 53m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Mon 22/9
17:16-10:50
1 stop11h 34m
London Heathrow
Fri 3/10
12:00-23:00
1 stop17h 00m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 11/2
14:08-08:35
1 stop12h 27m
London Heathrow
Wed 18/2
08:20-16:41
1 stop14h 21m
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Tue 30/9
12:44-06:25
1 stop11h 41m
London Heathrow
Tue 7/10
08:20-19:43
1 stop17h 23m
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.
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 37 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, January is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of £112). Flying from San Antonio to London Heathrow Airport in August is currently the most expensive (average of £164). 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 SAT to LHR?
When flying from San Antonio to London Heathrow Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 10% versus a flight in the morning.
What’s the top stopover airport for flights from San Antonio to London Heathrow Airport?
Dallas (DFW) – chosen by Cheapflights users on 62% of one-stop itineraries from San Antonio to London Heathrow Airport on Cheapflights.
What’s the fastest stopover option from San Antonio to London Heathrow Airport?
Flights via Houston (IAH) have the shortest average one-way travel time for one-stop routes: 11h 24m.
What’s the fastest stopover option from San Antonio to London Heathrow Airport?
Flights via Houston (IAH) have the shortest average one-way travel time for one-stop routes: 11h 24m.
Which airport typically offers the quickest stopover for flights from San Antonio to London Heathrow Airport?
Flights via Dallas (DFW) offer the fastest connection on this route, with an average stopover time of 1h 39m.
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.
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Alternative routes for San Antonio to Heathrow
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Fly with Cheapflights
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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.