HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Heathrow

$222+ 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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
SAT — LHR
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from San Antonio to Heathrow with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 January 6, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$569
(Cheapflightsfares)

One-way from

$276
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$777
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. 21% potential increase in price ($240 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($40 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 6, 2026.

This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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.
Mon 3/21:40 pmSAT - LHR
1 stop16h 35mBritish Airways
Mon 3/97:15 pmLHR - SAT
2 stops32h 39mBritish Airways
Deal found 1/6$569
This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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.
Wed 2/112:05 pmSAT - LHR
1 stop11h 50mLufthansa
Wed 2/1812:05 pmLHR - SAT
1 stop14h 23mLufthansa
Deal found 1/6$576
This Cheapflightsfares deal was found by Cheapflights users on 1/5. 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.
Tue 2/179:20 amSAT - LHR
1 stop17h 55mBritish Airways
Mon 2/237:15 pmLHR - SAT
2 stops28h 45mBritish Airways
Deal found 1/5$578
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/113:07 pmSAT - LHR
1 stop12h 53mBritish Airways
Wed 2/187:35 amLHR - SAT
2 stops19h 14mBritish Airways
Deal found 1/6$579
This Iberia deal was found by Cheapflights users on 1/5. 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.
Wed 2/113:07 pmSAT - LHR
1 stop12h 53mIberia
Wed 2/187:05 pmLHR - SAT
2 stops19h 18mIberia
Deal found 1/5$581
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/51:21 pmSAT - LHR
1 stop14h 19mLufthansa
Wed 3/1112:05 pmLHR - SAT
1 stop15h 52mLufthansa
Deal found 1/6$583
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/104:40 pmSAT - LHR
1 stop13h 35mBritish Airways
Tue 2/177:15 pmLHR - SAT
2 stops29h 09mBritish Airways
Deal found 1/6$586
This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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.
Sun 1/186:01 pmSAT - LHR
1 stop11h 39mBritish Airways
Tue 2/32:10 pmLHR - SAT
1 stop14h 33mBritish Airways
Deal found 1/6$589
This Air Canada deal was found by Cheapflights users on 1/6. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/109:00 amSAT - LHR
2 stops16h 10mMultiple Airlines
Tue 2/176:00 pmLHR - SAT
2 stops27h 15mMultiple Airlines
Deal found 1/6$597
This Cheapflightsfares deal was found by Cheapflights users on 1/4. 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.
Thu 2/195:25 pmSAT - LHR
1 stop11h 50mLufthansa
Sun 3/111:10 amLHR - SAT
2 stops18h 02mLufthansa
Deal found 1/4$601
This oojo deal was found by Cheapflights users on 1/6. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/211:12 pmSAT - LHR
1 stop12h 28mBritish Airways
Mon 11/27:15 pmLHR - SAT
2 stops29h 35mBritish Airways
Deal found 1/6$603

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 January 6, 2026.
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 3/18

3:08 pm-8:15 am

1 stop12h 07m

London Heathrow

Wed 4/22

4:25 pm-11:56 pm

1 stop13h 31m

$604

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/25

8:00 am-6:25 am

1 stop16h 25m

London Heathrow

Sun 3/1

8:40 am-10:28 pm

2 stops19h 48m

$607

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 3/5

7:20 am-6:40 am

1 stop17h 20m

London Heathrow

Wed 3/11

12:00 pm-12:25 pm

2 stops29h 25m

$610

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 4/1

12:22 pm-10:40 am

1 stop16h 18m

London Heathrow

Wed 4/8

11:30 am-12:38 am

2 stops19h 08m

$618

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 3/11

7:38 am-7:30 am

1 stop18h 52m

London Heathrow

Thu 3/19

6:35 am-8:46 pm

2 stops19h 11m

$622

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/25

2:10 pm-7:30 am

1 stop11h 20m

London Heathrow

Sun 3/1

10:00 am-5:50 pm

1 stop13h 50m

$627

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 3/11

2:20 pm-10:45 am

2 stops15h 25m

London Heathrow

Thu 3/19

8:30 am-10:57 pm

2 stops19h 27m

$629

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 2/20

8:00 am-8:45 am

2 stops18h 45m

London Heathrow

Fri 2/27

11:30 am-12:35 am

2 stops19h 05m

$632

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 2/6

8:00 am-9:00 am

1 stop19h 00m

London Heathrow

Sun 2/15

11:45 am-10:55 pm

2 stops17h 10m

$632

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 2/12

5:25 pm-11:15 am

1 stop11h 50m

London Heathrow

Mon 2/16

6:30 am-11:12 pm

2 stops22h 42m

$642

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/5

Showing 1-10 of 22 results
1
2
3

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 January.
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
OvagoPrice Accuracy2 starsTrust Score*2 stars
CheapflightsfaresPrice Accuracy3 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 January 2, 2026.

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 $829). 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?

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 January 6, 2026.
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

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
678 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
9,138 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
11,088 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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
7,657 reviews
Delta
7.9
Good
8,022 reviews

Crew

8.5

Overall

7.9

Comfort

7.9

Boarding

8.1

Food

7.2

Entertainment

7.8

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 $604, British Airways can have you in London Heathrow Airport from San Antonio in 12h 07m. 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 Delta, from $531. American Airlines is 39% 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 $829). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for San Antonio to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Heathrow flights
Hobby to Heathrow flights
George Bush Intcntl to Heathrow flights
Dallas/Fort Worth to Gatwick flights
Austin to Heathrow flights
Love Field to Heathrow flights
Dallas/Fort Worth to Stansted flights
Hobby to Gatwick flights
Dallas/Fort Worth to London City flights
George Bush Intcntl to Gatwick flights
Hobby to London City flights
Austin to Gatwick flights
George Bush Intcntl to London City flights
Austin to London City flights
George Bush Intcntl to Stansted flights
Love Field to Gatwick flights
Austin to Stansted flights
Dallas/Fort Worth to Luton flights
San Antonio to Gatwick flights
El Paso to Heathrow flights
San Antonio to London City flights
San Antonio to Stansted flights
El Paso to London City flights
Harlingen to Heathrow flights
Hobby to Luton flights
McAllen to Heathrow flights
Lubbock to Heathrow flights
Corpus Christi to Heathrow flights
El Paso to Gatwick flights
Abilene to Heathrow flights
Midland to Heathrow flights
McAllen to London City flights
McAllen to Gatwick flights
Love Field to London City flights
Lubbock to Gatwick flights
Killeen to Heathrow flights
Brownsville to Heathrow flights
Midland to Gatwick flights
College Station to Heathrow flights
Texarkana to Heathrow flights
Texarkana to Gatwick flights
San Angelo to Heathrow flights

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 January 6, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$530Average$847FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$531Average$928FlexibilityNo cancel feeOn-time69%
DeltaCheapest$531Average$703FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$566Average$859FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$600Average$780FlexibilityNo cancel feeOn-time72%
IberiaCheapest$668Average$956FlexibilityNo cancel feeOn-time77%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.