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$163+ Cheap flights from San Antonio (SAT) to Heathrow (LHR)

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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Aug 26 — Sep 21
Wed 8/26
Wed 9/2
1 adult, Economy
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Cheap flight deals from San Antonio to Heathrow

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 July 27, 2026.

This United Airlines deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/37:28 am
SAT
-
LHR
2 stops22h 22m
United Airlines
Thu 11/57:30 am
LHR
-
SAT
2 stops19h 23m
United Airlines
Deal found 7/26$750
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/104:45 pm
SAT
-
LHR
1 stop34h 55m
United Airlines
Sun 12/137:30 am
LHR
-
SAT
2 stops19h 37m
United Airlines
Deal found 7/27$860
This Virgin Atlantic deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/264:29 pm
SAT
-
LHR
1 stop11h 31m
Virgin Atlantic
Fri 10/3010:00 am
LHR
-
SAT
2 stops16h 53m
Virgin Atlantic
Deal found 7/27$870
This Delta deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3012:50 pm
SAT
-
LHR
1 stop12h 55m
Delta
Thu 1/146:30 am
LHR
-
SAT
2 stops16h 48m
Delta
Deal found 7/27$871
This Delta deal was found by Cheapflights users on 7/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/266:22 pm
SAT
-
LHR
1 stop12h 18m
Delta
Tue 11/108:40 am
LHR
-
SAT
2 stops18h 52m
Delta
Deal found 7/24$872
This Iberia deal was found by Cheapflights users on 7/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1711:22 am
SAT
-
LHR
1 stop16h 38m
Iberia
Mon 11/237:40 pm
LHR
-
SAT
2 stops18h 54m
Iberia
Deal found 7/26$874
This Expedia deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/262:05 pm
SAT
-
LHR
1 stop18h 20m
Iberia
Fri 10/3011:55 am
LHR
-
SAT
1 stop14h 12m
Iberia
Deal found 7/27$875
This United Airlines deal was found by Cheapflights users on 7/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2611:45 am
SAT
-
LHR
2 stops13h 55m
United Airlines
Fri 10/307:30 am
LHR
-
SAT
2 stops18h 23m
United Airlines
Deal found 7/27$882

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 July 27, 2026.

Most accurate provider

Ovago
3 stars

Most trusted provider

Ovago
3 stars

Round-trip from

$750
(United Airlines)

One-way from

$163
(KAYAK)

Popular in

June

Cheapest in

October

Average price

$1,167
Provider with most accurate pricing for San Antonio-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for San Antonio-London Heathrow flights.
Search Deals
From San Antonio to London Heathrow
Search Deals
One-way flight from San Antonio to London Heathrow
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($35 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in July 2026
Search Deals

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated July 27, 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 round-trip

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 12/10

4:45 pm-9:40 am

1 stop34h 55m

London Heathrow

Sun 12/13

7:30 am-9:07 pm

2 stops19h 37m

$860

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/30

10:45 am-11:40 am

1 stop18h 55m

London Heathrow

Wed 1/13

10:00 am-11:20 pm

2 stops19h 20m

$871

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/30

2:10 pm-11:40 am

1 stop15h 30m

London Heathrow

Thu 1/14

8:40 am-8:22 pm

2 stops17h 42m

$872

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

5:30 am-6:25 am

1 stop18h 55m

London Heathrow

Fri 10/2

9:55 am-10:44 pm

2 stops18h 49m

$885

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/27

4:29 pm-9:00 am

1 stop11h 31m

London Heathrow

Wed 11/4

10:45 am-12:30 am

1 stop19h 45m

$900

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 11/3

12:24 pm-6:40 am

1 stop12h 16m

London Heathrow

Thu 11/5

7:40 am-4:39 pm

1 stop14h 59m

$900
Quickest round-trip

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/30

2:00 pm-7:55 am

1 stop11h 55m

London Heathrow

Thu 1/14

10:00 am-5:33 pm

1 stop13h 33m

$901

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 9/22

4:39 pm-12:25 pm

1 stop13h 46m

London Heathrow

Fri 10/2

8:30 am-9:13 pm

1 stop18h 43m

$911
Cheapest one-way

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 11/2

7:28 am-11:50 am

2 stops22h 22m

$328
Quickest one-way

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 12/11

5:52 pm-12:15 pm

1 stop12h 23m

$377

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

Compare providers for flights from San Antonio to Heathrow

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Antonio to Heathrow in July.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
OvagoPrice Accuracy3 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on San Antonio-London Heathrow Airport flights, users find the pricing of Ovago to be most consistent on Cheapflights vs. Ovago Users can find the same prices on San Antonio-London Heathrow Airport flight deals on Cheapflights vs. Ovago >95% of the time. Price accuracy is based on data collected from San Antonio-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on San Antonio-London Heathrow Airport flights, Cheapflights users trust Ovago the most. Ovago has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Antonio-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

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 round-trip 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?

To ensure you get the cheapest price possible for a flight from San Antonio to London Heathrow Airport, you should look to book at least 75 days in advance of your intended travel date. The price of your flight may increase if you delay and leave booking until a week or so before departure.

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 $580). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $1,282). 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 to fly round-trip from San Antonio to London Heathrow Airport?

Airfare is typical for this route at the moment.

San Antonio to London Heathrow Airport flights typically cost between $678 and $934 in November.
The cheapest round-trip price found within the last 5 days was $750 on United Airlines (Nov 3-Nov 5).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Heathrow. Reviews last updated July 27, 2026.
Peruse reviews from past customers who have flown with Delta,Virgin Atlantic, andUnited Airlines from San Antonio to London Heathrow Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
7.8
Good
8,490 reviews
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Virgin Atlantic
7.5
Good
695 reviews
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
10,043 reviews
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
American Airlines
7.1
Good
11,843 reviews
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
British Airways
6.7
Okay
8,130 reviews
Delta
7.8
Good
8,490 reviews

Food

7.2

Overall

7.8

Comfort

7.8

Crew

8.5

Boarding

8.1

Entertainment

7.8

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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?

    Located just 7.6 mi from the city center, San Antonio is the airport most travelers will use when flying to London Heathrow from San Antonio. Booking flights from San Antonio (SAT) to London Heathrow should be relatively easy as there are 0 daily outbound flights to London Heathrow from 5 different airlines.

  • How long is the flight from San Antonio to London Heathrow Airport?

    For as low as $871, United Airlines can have you in London Heathrow Airport from San Antonio in 18h 55m. There are 4967 mi between San Antonio and London Heathrow Airport. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from San Antonio to London Heathrow Airport round-trip?

    Cheapflights users have booked flights from San Antonio to London Heathrow Airport round-trip from $529. Other airlines that can offer you cheap pricing are Delta, from $530, and American Airlines, from $530. United Airlines is 41% cheaper than the average price of flights available within the next 90 days to this destination.

  • 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 vacation 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 $580). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $1,282). 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

Traveling to a place near London Heathrow Airport?

Book flights to London Heathrow Airport if you plan to visit one of these locations
Ilford
Dorking
Hounslow
Winchester
Croydon
Gatwick
Wembley
Harrow
Eastleigh
Southend-on-Sea
Watford
Northampton
Dartford
Chipping Norton
Kingston upon Thames
Eastbourne
Slough
Stansted
Sutton
Luton

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Top 5 airlines flying from San Antonio to Heathrow

Discover the top 5 airlines that operate flights from San Antonio to Heathrow. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated July 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$529Average$931FlexibilityNo cancel feeOn-time69%
DeltaCheapest$530Average$656FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$530Average$1,026FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$555Average$925FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$600Average$780FlexibilityNo cancel feeOn-time72%

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