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$223+ 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 5/5. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
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Cheapflights Tip: The best prices from San Antonio to London Heathrow are usually found in October or August, booked 75 days in advance, depart on a Thursday or Sunday and return on a Monday

Find 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 November 12, 2025.

This Delta deal was found by Cheapflights users on 11/11. 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 11/2611:35 amSAT - LHR
1 stop18h 05mDelta
Thu 12/411:30 amLHR - SAT
2 stops17h 27mDelta
Deal found 11/11$589
This KLM deal was found by Cheapflights users on 11/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/264:57 pmSAT - LHR
1 stop12h 43mKLM
Thu 12/410:45 amLHR - SAT
1 stop15h 38mKLM
Deal found 11/10$596
This KLM deal was found by Cheapflights users on 11/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/31:06 pmSAT - LHR
1 stop12h 44mKLM
Wed 12/1011:05 amLHR - SAT
1 stop16h 14mKLM
Deal found 11/11$597
This Virgin Atlantic deal was found by Cheapflights users on 11/9. 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.
Tue 12/93:00 pmSAT - LHR
2 stops13h 50mVirgin Atlantic
Tue 12/169:40 amLHR - SAT
2 stops17h 23mVirgin Atlantic
Deal found 11/9$600
This Delta deal was found by Cheapflights users on 11/10. 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.
Tue 12/306:00 amSAT - LHR
1 stop19h 05mDelta
Fri 1/94:35 pmLHR - SAT
1 stop35h 24mDelta
Deal found 11/10$601
This Delta deal was found by Cheapflights users on 11/10. 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 12/296:22 pmSAT - LHR
1 stop31h 28mDelta
Fri 1/99:40 amLHR - SAT
2 stops19h 50mDelta
Deal found 11/10$605
This Delta deal was found by Cheapflights users on 11/11. 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 11/1911:35 amSAT - LHR
2 stops14h 05mDelta
Wed 12/36:20 amLHR - SAT
2 stops17h 00mDelta
Deal found 11/11$620
This Delta deal was found by Cheapflights users on 11/10. 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 12/313:20 pmSAT - LHR
1 stop14h 05mDelta
Sun 1/1110:45 amLHR - SAT
1 stop18h 45mDelta
Deal found 11/10$621
This Delta deal was found by Cheapflights users on 11/11. 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 12/311:51 amSAT - LHR
2 stops16h 24mDelta
Wed 12/106:30 amLHR - SAT
2 stops16h 50mDelta
Deal found 11/11$623
This Delta deal was found by Cheapflights users on 11/10. 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.
Tue 12/305:20 amSAT - LHR
2 stops19h 05mDelta
Sat 1/1012:40 pmLHR - SAT
2 stops16h 50mDelta
Deal found 11/10$625

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 November 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$589
(Delta)

One-way from

$223
(Iberia)

Popular in

December

Cheapest in

October

Average price

$857
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. 11% potential increase in price ($127 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($66 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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 November 12, 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 11/26

1:05 pm-7:50 am

1 stop12h 45m

London Heathrow

Thu 12/4

11:30 am-11:17 pm

2 stops17h 47m

$589

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/26

4:57 pm-11:40 am

1 stop12h 43m

London Heathrow

Thu 12/4

10:45 am-8:23 pm

1 stop15h 38m

$596

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/3

1:06 pm-7:50 am

1 stop12h 44m

London Heathrow

Wed 12/10

11:05 am-9:19 pm

1 stop16h 14m

$597

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/31

7:05 am-9:00 am

1 stop19h 55m

London Heathrow

Fri 1/9

8:55 am-8:45 pm

2 stops17h 50m

$600

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/30

6:22 pm-11:40 am

1 stop11h 18m

London Heathrow

Fri 1/9

4:50 pm-3:22 pm

2 stops28h 32m

$600

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 1/13

12:55 pm-6:55 am

1 stop12h 00m

London Heathrow

Sun 1/18

11:45 am-10:57 pm

2 stops17h 12m

$601

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 1/13

11:12 am-9:00 am

1 stop15h 48m

London Heathrow

Mon 1/19

6:30 am-5:24 pm

2 stops16h 54m

$601

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 12/3

11:36 am-11:40 am

1 stop18h 04m

London Heathrow

Wed 12/10

6:30 am-6:26 pm

2 stops17h 56m

$619

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 1/15

5:20 am-6:25 am

1 stop19h 05m

London Heathrow

Mon 1/19

8:40 am-8:27 pm

2 stops17h 47m

$626

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 5/5

6:48 pm-12:10 pm

1 stop11h 22m

$223

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 19 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 November.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
oojoPrice 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 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 November 7, 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 74 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 $852). 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 November 12, 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.

What is the cheapest day to fly from San Antonio to London Heathrow Airport?

Use this chart to determine the cheapest time to fly round-trip from San Antonio to Heathrow. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their San Antonio to London Heathrow Airport flight should consider departing on Wednesday afternoons when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 November 12, 2025.
Peruse reviews from past customers who have flown with Delta, United Airlines, and American 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
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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
8,008 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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
9,015 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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
11,050 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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.
Iberia
7.0
Good
3,009 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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
7,513 reviews
Delta
7.9
Good
8,008 reviews

Entertainment

7.9

Food

7.3

Overall

7.9

Comfort

7.9

Crew

8.5

Boarding

8.1

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 $596, Delta can have you in London Heathrow Airport from San Antonio in 12h 43m. 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 $530. Other airlines that can offer you cheap pricing are United Airlines, from $531, and British Airways, from $566. Delta is 46% 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 $852). 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
Hounslow
Ilford
Hayes
Southend-on-Sea
Harrow
Croydon
Eastleigh
Dartford
Dover
Winchester
Orpington
Northampton
Gatwick
Borehamwood
Broadway
Aylesbury
Bedford
Chipping Norton
Wembley
Folkestone

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See prices for flight routes from nearby airports that may be better suited for you.
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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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$530Average$1,004FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$531Average$924FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$566Average$898FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$571Average$941FlexibilityNo cancel feeOn-time71%
Virgin AtlanticCheapest$600Average$988FlexibilityNo cancel feeOn-time72%
IberiaCheapest$668Average$999FlexibilityNo cancel feeOn-time77%

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