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$456+ 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 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or February, booked 75 days in advance, depart on a Thursday or Sunday and return on a Monday

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 December 28, 2025.

This United Airlines deal was found by Cheapflights users on 12/27. 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.
Sat 12/277:04 pmSAT - LHR
1 stop30h 26mUnited Airlines
Thu 1/81:00 pmLHR - SAT
2 stops30h 08mUnited Airlines
Deal found 12/27$891
This Cheapflightsfares deal was found by Cheapflights users on 12/27. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/271:10 pmSAT - LHR
1 stop14h 30mLufthansa
Thu 1/812:05 pmLHR - SAT
1 stop14h 51mLufthansa
Deal found 12/27$902
This Delta deal was found by Cheapflights users on 12/26. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/277:05 amSAT - LHR
2 stops18h 00mDelta
Thu 1/810:45 amLHR - SAT
2 stops18h 10mDelta
Deal found 12/26$990
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Sun 12/287:30 pmSAT - LHR
1 stop32h 45mUnited Airlines
Mon 1/54:20 pmLHR - SAT
2 stops24h 27mUnited Airlines
Deal found 12/26$1,131
This Ovago deal was found by Cheapflights users on 12/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/284:05 pmSAT - LHR
1 stop33h 25mLufthansa
Mon 1/54:20 pmLHR - SAT
1 stop34h 36mLufthansa
Deal found 12/26$1,142
This United Airlines deal was found by Cheapflights users on 12/26. 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.
Sat 12/279:51 amSAT - LHR
2 stops16h 04mUnited Airlines
Sun 1/47:40 amLHR - SAT
2 stops18h 01mUnited Airlines
Deal found 12/26$1,231
This Ovago deal was found by Cheapflights users on 12/26. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:56 pmSAT - LHR
1 stop16h 44mBritish Airways
Thu 1/111:45 amLHR - SAT
1 stop17h 08mBritish Airways
Deal found 12/26$1,509

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 December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$598
(Cheapflightsfares)

One-way from

$456
(Ovago)

Popular in

June

Cheapest in

October

Average price

$1,328
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. 18% potential increase in price ($208 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($37 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 28, 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 2/4

2:09 pm-7:55 am

1 stop11h 46m

London Heathrow

Wed 2/11

7:40 am-8:44 pm

2 stops19h 04m

$598

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 3/18

2:20 pm-7:30 am

1 stop12h 10m

London Heathrow

Wed 3/25

7:40 am-8:46 pm

2 stops18h 06m

$598

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/30

4:04 pm-10:15 am

1 stop12h 11m

London Heathrow

Thu 2/5

9:30 am-9:21 pm

2 stops17h 51m

$609

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/11

2:05 pm-7:55 am

1 stop11h 50m

London Heathrow

Fri 2/27

12:05 pm-8:28 pm

1 stop14h 23m

$624

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/11

2:05 pm-7:55 am

1 stop11h 50m

London Heathrow

Wed 2/18

10:00 am-5:50 pm

1 stop13h 50m

$624

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/23

11:43 am-9:10 am

2 stops15h 27m

London Heathrow

Tue 1/27

6:35 am-8:44 pm

2 stops20h 09m

$630

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/4

2:21 pm-7:30 am

1 stop11h 09m

London Heathrow

Wed 2/11

6:35 am-8:44 pm

2 stops20h 09m

$630

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/2

6:00 am-7:05 am

1 stop19h 05m

$511

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 1/3

7:04 pm-10:15 am

1 stop33h 11m

$572

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/2

2:08 pm-7:55 am

1 stop11h 47m

$626

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 14 results
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 December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
OvagoPrice Accuracy2 starsTrust Score*2 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Antonio-London Heathrow Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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?

Use this chart to determine the optimal time to book a round-trip flight from San Antonio to Heathrow. Price data was last updated on December 26, 2025.

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 29 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $527). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $835). 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 December 28, 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 noon, which can drop the price by up to 13% versus a flight in the evening.

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 December 28, 2025.
Peruse reviews from past customers who have flown with Delta, Virgin Atlantic, and United 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
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,022 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Virgin Atlantic
7.5
Good
677 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
United Airlines
7.4
Good
9,117 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
American Airlines
7.2
Good
11,072 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,617 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Food

7.3

Comfort

7.9

Entertainment

7.9

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

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 6 different airlines.

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

    For as low as $598, Lufthansa can have you in London Heathrow Airport from San Antonio in 11h 46m. There are 4967 mi between San Antonio and London Heathrow Airport.

  • 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 $530. Other airlines that can offer you cheap pricing are United Airlines, from $531, and Delta, from $531. American Airlines is 42% 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, September is the cheapest month in which you can book a flight from San Antonio to London Heathrow Airport (average of $527). Flying from San Antonio to London Heathrow Airport in June is currently the most expensive (average of $835). 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
Hounslow
Southend-on-Sea
Harrow
Eastleigh
Gatwick
Dartford
Dover
Winchester
Croydon
Orpington
Northampton
Watford
Hayes
Borehamwood
Broadway
Aylesbury
Chipping Norton
Horley
Kingston upon Thames

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Top 6 airlines flying from San Antonio to Heathrow

Discover the top 6 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$530Average$849FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$531Average$924FlexibilityNo cancel feeOn-time69%
DeltaCheapest$531Average$703FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$566Average$864FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$600Average$780FlexibilityNo cancel feeOn-time72%
IberiaCheapest$668Average$956FlexibilityNo cancel feeOn-time77%

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