Cheap flights from San Antonio to London Heathrow Airport from £170
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 15/3. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
7 Dec — 14 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 74 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 7 November 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 7 November 2025.
Sun 9/1114:46SAT - LHR
1 stop12h 14mKLM
Tue 25/1115:50LHR - SAT
1 stop14h 48mKLM
Deal found 6/11£448
Wed 26/1106:32SAT - LHR
1 stop18h 33mDelta
Thu 4/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 7/11£449
Sun 9/1111:35SAT - LHR
1 stop18h 05mDelta
Tue 25/1108:40LHR - SAT
2 stops18h 22mDelta
Deal found 6/11£451
Wed 3/1215:00SAT - LHR
2 stops13h 50mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 5/11£454
Tue 30/1218:22SAT - LHR
1 stop11h 18mVirgin Atlantic
Fri 9/109:40LHR - SAT
2 stops19h 17mVirgin Atlantic
Deal found 6/11£458
Fri 5/1212:10SAT - LHR
1 stop16h 05mDelta
Wed 10/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 6/11£468
Fri 5/1206:25SAT - LHR
1 stop18h 40mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 5/11£469
Best flights from San Antonio to Heathrow
Discover carefully curated flight deals from San Antonio to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 7 November 2025.
Wed 26/1106:32SAT - LHR
1 stop18h 33mDelta
Thu 4/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 7/11£449
Wed 3/1212:46SAT - LHR
1 stop15h 14mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 5/11£450
Mon 8/1211:36SAT - LHR
1 stop18h 04mDelta
Wed 24/1206:30LHR - SAT
2 stops21h 23mDelta
Deal found 6/11£451
Fri 5/1206:25SAT - LHR
1 stop18h 40mVirgin Atlantic
Wed 10/1208:55LHR - SAT
1 stop18h 08mVirgin Atlantic
Deal found 6/11£474
Wed 11/210:57SAT - LHR
2 stops15h 08mDelta
Wed 18/211:30LHR - SAT
2 stops19h 06mDelta
Deal found 6/11£459
Fri 5/1212:10SAT - LHR
1 stop16h 05mDelta
Wed 10/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 6/11£468
Wed 19/1111:35SAT - LHR
2 stops14h 05mDelta
Wed 3/1206:20LHR - SAT
2 stops17h 00mDelta
Deal found 5/11£474
Fri 5/1205:10SAT - LHR
1 stop20h 40mDelta
Fri 12/1210:45LHR - SAT
1 stop15h 38mDelta
Deal found 5/11£474
Last-minute flights from San Antonio to Heathrow
Discover last-minute flight deals from San Antonio to Heathrow. Data last updated 7 November 2025 and is based on user searches.
Sun 9/1114:46SAT - LHR
1 stop12h 14mKLM
Tue 25/1115:50LHR - SAT
1 stop14h 48mKLM
Deal found 6/11£448
Sun 9/1111:35SAT - LHR
1 stop18h 05mDelta
Tue 25/1108:40LHR - SAT
2 stops18h 22mDelta
Deal found 6/11£451
Wed 26/1106:32SAT - LHR
1 stop18h 33mDelta
Thu 4/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 7/11£449
Wed 3/1215:00SAT - LHR
2 stops13h 50mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 5/11£454
Fri 5/1212:10SAT - LHR
1 stop16h 05mDelta
Wed 10/1211:30LHR - SAT
2 stops19h 04mDelta
Deal found 6/11£468
Fri 5/1206:25SAT - LHR
1 stop18h 40mVirgin Atlantic
Wed 10/1211:30LHR - SAT
2 stops17h 27mVirgin Atlantic
Deal found 5/11£469
Tue 30/1218:22SAT - LHR
1 stop11h 18mVirgin Atlantic
Fri 9/109:40LHR - SAT
2 stops19h 17mVirgin Atlantic
Deal found 6/11£458
One-way flights from San Antonio to Heathrow
Search for one-way flight options from San Antonio to Heathrow. Find affordable one-way fares based on user searches. Data last updated 7 November 2025.
Sun 15/318:11SAT - LHR
1 stop12h 49mAmerican Airlines
Deal found 5/11£170
Sat 15/1110:58SAT - LHR
3 stops41h 52mMultiple Airlines
Deal found 5/11£226
Sun 15/310:45SAT - LHR
2 stops17h 00mDelta
Deal found 5/11£366
Sun 15/318:13SAT - LHR
3 stops46h 22mMultiple Airlines
Deal found 5/11£376
Sat 15/1115:00SAT - LHR
1 stop33h 50mIberia
Deal found 5/11£381
Thu 1/115:00SAT - LHR
1 stop11h 35mBritish Airways
Deal found 5/11£406
Thu 1/110:35SAT - LHR
2 stops16h 40mIberia
Deal found 5/11£420
Thu 20/1113:05SAT - LHR
1 stop16h 35mDelta
Deal found 5/11£511
Fri 21/1117:59SAT - LHR
1 stop34h 01mDelta
Deal found 5/11£524
Fri 21/1105:23SAT - LHR
2 stops43h 02mAmerican Airlines
Deal found 5/11£567
Tue 9/1206:00SAT - LHR
3 stops31h 30mMultiple Airlines
Deal found 6/11£1,077
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 7 November 2025.
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
Wed 26/11
06:32-07:05
1 stop18h 33m
London Heathrow
Thu 4/12
11:30-00:34
2 stops19h 04m
£449
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 3/12
12:46-10:00
1 stop15h 14m
London Heathrow
Wed 10/12
11:30-22:57
2 stops17h 27m
£450
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Mon 8/12
11:36-11:40
1 stop18h 04m
London Heathrow
Wed 24/12
06:30-21:53
2 stops21h 23m
£451
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 11/2
10:57-08:05
2 stops15h 08m
London Heathrow
Wed 18/2
11:30-00:36
2 stops19h 06m
£459
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Fri 5/12
12:10-10:15
1 stop16h 05m
London Heathrow
Wed 10/12
11:30-00:34
2 stops19h 04m
£468
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Fri 5/12
06:25-07:05
1 stop18h 40m
London Heathrow
Wed 10/12
08:55-21:03
1 stop18h 08m
£474
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Wed 19/11
11:35-07:40
2 stops14h 05m
London Heathrow
Wed 3/12
06:20-17:20
2 stops17h 00m
£474
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Fri 5/12
05:10-07:50
1 stop20h 40m
London Heathrow
Fri 12/12
10:45-20:23
1 stop15h 38m
£474
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Sun 15/3
18:11-12:00
1 stop12h 49m
£170
San AntonioLondon
SAT - LHR
SATLHR
San Antonio
Sun 15/3
10:45-08:45
2 stops17h 00m
£366
Flights are sorted by cheapest return flights first.
Deals found on 5/11
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
Prices
More
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 31 October 2025.
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 74 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 £402). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £664). 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?
Find hourly flight availability from San Antonio to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 7 November 2025.
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 evening.
How much does it cost for a return flight from San Antonio to London Heathrow Airport?
What’s the top stopover airport for flights from San Antonio to London Heathrow Airport?
Share of one-stop return flights from San Antonio to London Heathrow Airport chosen by Cheapflights users in the past 12 months, using the same stopover each way.
Houston (IAH) – chosen by Cheapflights users on 38% 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?
Shortest average travel time for one-stop one-way flights from San Antonio to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover 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?
Shortest average travel time for one-stop one-way flights from San Antonio to London Heathrow Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by stopover 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?
Average stopover duration for one-stop one-way flights from San Antonio to London Heathrow Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Atlanta (ATL) offer the fastest connection on this route, with an average stopover time of 1h 52m.
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 15h 14m. Delta provides one of the quickest options available for as low as £450. 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.
What are the cheapest airlines to fly from San Antonio to London Heathrow Airport one-way?
To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at £170. Delta flights start at £366 while deals on Iberia start at £420 one-way.
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 £402). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of £664). 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.
Explore flights to Heathrow departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 7 November 2025.
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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