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

For as low as $623, Lufthansa can have you in London Heathrow Airport from San Antonio in 12h 25m. 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 43% cheaper than the average price of flights available within the next 90 days to this destination.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

What are the most popular airlines that fly from San Antonio to London Heathrow Airport?

When booking a flight from San Antonio to London Heathrow Airport, you may want to consider flying on British Airways, United Airlines or American Airlines as they are the most popular for this route.

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.

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.

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.

$223+ Flights from San Antonio to London Heathrow Airport

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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.

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

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 17, 2025.

Sat 12/275:59 pmSAT - LHR

1 stop31h 31mUnited Airlines

Thu 1/81:25 pmLHR - SAT

2 stops39h 50mUnited Airlines

Deal found 12/15

$818

Sat 12/274:05 pmSAT - LHR

1 stop33h 25mLufthansa

Thu 1/812:05 pmLHR - SAT

1 stop14h 51mLufthansa

Deal found 12/16

$833

Tue 12/164:14 pmSAT - LHR

1 stop12h 01mLufthansa

Mon 12/2212:05 pmLHR - SAT

1 stop14h 19mLufthansa

Deal found 12/15

$851

Tue 12/234:05 pmSAT - LHR

1 stop33h 25mLufthansa

Mon 12/2911:35 amLHR - SAT

1 stop15h 25mLufthansa

Deal found 12/17

$895

Tue 12/237:30 pmSAT - LHR

1 stop30h 00mUnited Airlines

Sun 12/2810:25 amLHR - SAT

1 stop18h 29mUnited Airlines

Deal found 12/17

$898

Wed 12/248:43 amSAT - LHR

1 stop21h 17mBritish Airways

Tue 12/3011:45 amLHR - SAT

1 stop14h 45mBritish Airways

Deal found 12/17

$899

Tue 12/1611:47 amSAT - LHR

1 stop13h 43mUnited Airlines

Mon 12/221:35 pmLHR - SAT

1 stop15h 19mUnited Airlines

Deal found 12/15

$906

Wed 12/2412:25 pmSAT - LHR

2 stops14h 55mMultiple Airlines

Tue 12/306:30 amLHR - SAT

2 stops20h 30mMultiple Airlines

Deal found 12/17

$909

Best flights from San Antonio to Heathrow
Discover carefully curated flight deals from San Antonio to Heathrow that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 17, 2025.

Wed 1/1412:15 pmSAT - LHR

1 stop12h 25mLufthansa

Wed 1/2112:05 pmLHR - SAT

1 stop14h 51mLufthansa

Deal found 12/16

$623

Wed 2/257:00 amSAT - LHR

2 stops17h 20mUnited Airlines

Wed 3/46:35 amLHR - SAT

2 stops19h 53mUnited Airlines

Deal found 12/16

$628

Wed 4/110:46 amSAT - LHR

1 stop13h 44mDelta

Wed 4/88:40 amLHR - SAT

2 stops20h 02mDelta

Deal found 12/17

$645

Fri 1/3012:25 pmSAT - LHR

1 stop12h 25mKLM

Fri 2/612:30 pmLHR - SAT

1 stop18h 08mKLM

Deal found 12/15

$647

Sat 1/3111:43 amSAT - LHR

2 stops15h 27mUnited Airlines

Sat 2/76:50 amLHR - SAT

2 stops20h 06mUnited Airlines

Deal found 12/16

$628

Sun 4/192:00 pmSAT - LHR

1 stop17h 10mDelta

Thu 4/308:40 amLHR - SAT

2 stops17h 37mDelta

Deal found 12/16

$645

Fri 1/3011:43 amSAT - LHR

2 stops14h 42mUnited Airlines

Fri 2/66:35 amLHR - SAT

2 stops20h 21mUnited Airlines

Deal found 12/15

$629

Tue 4/145:50 pmSAT - LHR

1 stop13h 20mDelta

Wed 4/228:40 amLHR - SAT

2 stops18h 48mDelta

Deal found 12/16

$645

Thu 1/152:05 pmSAT - LHR

2 stops14h 45mUnited Airlines

Fri 1/236:35 amLHR - SAT

2 stops20h 09mUnited Airlines

Deal found 12/15

$633

Fri 1/237:40 amSAT - LHR

1 stop17h 50mUnited Airlines

Mon 1/261:25 pmLHR - SAT

2 stops39h 48mUnited Airlines

Deal found 12/14

$637

Sat 3/75:50 pmSAT - LHR

2 stops31h 20mUnited Airlines

Sat 3/219:30 amLHR - SAT

2 stops18h 27mUnited Airlines

Deal found 12/16

$643

Last-minute flights from San Antonio to Heathrow
Discover last-minute flight deals from San Antonio to Heathrow. Data last updated December 17, 2025 and is based on user searches.

Mon 1/1211:12 amSAT - LHR

1 stop15h 48mVirgin Atlantic

Sun 1/258:40 amLHR - SAT

2 stops17h 45mVirgin Atlantic

Deal found 12/15

$622

Mon 1/122:06 pmSAT - LHR

2 stops19h 44mLufthansa

Mon 1/197:30 amLHR - SAT

2 stops19h 51mLufthansa

Deal found 12/14

$626

Wed 1/141:20 pmSAT - LHR

1 stop14h 20mLufthansa

Wed 1/218:30 amLHR - SAT

2 stops20h 43mLufthansa

Deal found 12/16

$607

Wed 1/149:50 amSAT - LHR

2 stops15h 20mUnited Airlines

Wed 1/216:35 amLHR - SAT

2 stops20h 09mUnited Airlines

Deal found 12/15

$632

Thu 1/1512:15 pmSAT - LHR

1 stop12h 25mLufthansa

Thu 1/2911:10 amLHR - SAT

2 stops18h 03mLufthansa

Deal found 12/16

$597

Thu 1/152:05 pmSAT - LHR

2 stops19h 45mLufthansa

Thu 1/226:35 amLHR - SAT

2 stops20h 09mLufthansa

Deal found 12/15

$605

Thu 1/152:05 pmSAT - LHR

2 stops14h 45mUnited Airlines

Fri 1/236:35 amLHR - SAT

2 stops20h 09mUnited Airlines

Deal found 12/15

$633

Thu 1/291:40 pmSAT - LHR

2 stops15h 10mVirgin Atlantic

Thu 2/56:30 amLHR - SAT

2 stops16h 52mVirgin Atlantic

Deal found 12/14

$634

Fri 1/3012:15 pmSAT - LHR

1 stop12h 25mUnited Airlines

Fri 2/66:35 amLHR - SAT

2 stops20h 21mUnited Airlines

Deal found 12/16

$628

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 December 17, 2025.

Wed 4/86:15 amSAT - LHR

1 stop19h 05mIberia

Deal found 12/17

$223

Fri 1/308:24 pmSAT - LHR

3 stops58h 26mMultiple Airlines

Deal found 12/14

$318

Wed 4/81:44 pmSAT - LHR

3 stops45h 21mMultiple Airlines

Deal found 12/17

$401

Fri 1/302:06 pmSAT - LHR

2 stops15h 09mLufthansa

Deal found 12/15

$418

Wed 4/810:46 amSAT - LHR

2 stops16h 04mDelta

Deal found 12/17

$461

Fri 1/26:00 amSAT - LHR

1 stop19h 05mDelta

Deal found 12/16

$511

Tue 5/194:17 pmSAT - LHR

1 stop13h 18mUnited Airlines

Deal found 12/16

$520

Wed 12/2410:08 amSAT - LHR

1 stop19h 52mBritish Airways

Deal found 12/15

$526

Tue 12/238:19 pmSAT - LHR

1 stop28h 31mBritish Airways

Deal found 12/15

$538

Wed 12/242:10 pmSAT - LHR

2 stops15h 15mDelta

Deal found 12/15

$632

Find flight deals from San Antonio to Heathrow

Most accurate provider	eDreams 3 stars
Most trusted provider	eDreams 3 stars
Round-trip from	$597 (Cheapflightsfares)
One-way from	$223 (Expedia)
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. 17% potential increase in price ($196 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 4% potential price decrease ($38 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Cheapflights Fare Finder

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

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 1/14

12:15 pm-6:40 am

1 stop12h 25m

London Heathrow

Wed 1/21

12:05 pm-8:56 pm

1 stop14h 51m

$623

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 2/25

7:00 am-6:20 am

2 stops17h 20m

London Heathrow

Wed 3/4

6:35 am-8:28 pm

2 stops19h 53m

$628

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 1/31

11:43 am-9:10 am

2 stops15h 27m

London Heathrow

Sat 2/7

6:50 am-8:56 pm

2 stops20h 06m

$628

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/30

11:43 am-8:25 am

2 stops14h 42m

London Heathrow

Fri 2/6

6:35 am-8:56 pm

2 stops20h 21m

$629

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 1/15

2:05 pm-10:50 am

2 stops14h 45m

London Heathrow

Fri 1/23

6:35 am-8:44 pm

2 stops20h 09m

$633

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Fri 1/23

7:40 am-7:30 am

1 stop17h 50m

London Heathrow

Mon 1/26

1:25 pm-11:13 pm

2 stops39h 48m

$637

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sat 3/7

5:50 pm-7:10 am

2 stops31h 20m

London Heathrow

Sat 3/21

9:30 am-10:57 pm

2 stops18h 27m

$643

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 4/1

10:46 am-6:30 am

1 stop13h 44m

London Heathrow

Wed 4/8

8:40 am-10:42 pm

2 stops20h 02m

$645

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Sun 4/19

2:00 pm-1:10 pm

1 stop17h 10m

London Heathrow

Thu 4/30

8:40 am-8:17 pm

2 stops17h 37m

$645

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 4/14

5:50 pm-1:10 pm

1 stop13h 20m

London Heathrow

Wed 4/22

8:40 am-9:28 pm

2 stops18h 48m

$645

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/17

Showing 1-10 of 20 results

Compare providers for flights from San Antonio to Heathrow

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.

Provider	Price Accuracy	Trust Score*
Expedia	Price Accuracy2 stars	Trust Score*3 stars
FlightHub	Price Accuracy3 stars	Trust Score*1 star
eDreams	Price Accuracy3 stars	Trust Score*3 stars
AranGrant	Price Accuracy2 stars	Trust Score*3 stars
Cheapflightsfares	Price Accuracy3 stars	Trust Score*2 stars
Ovago	Price Accuracy2 stars	Trust 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?

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?

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?

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

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

8,006 reviews

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

8,006 reviews

Delta

7.9

Good

8,006 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Virgin Atlantic

7.5

Good

675 reviews

Delta

7.9

Good

8,006 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

United Airlines

7.4

Good

9,091 reviews

Delta

7.9

Good

8,006 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

American Airlines

7.2

Good

11,054 reviews

Delta

7.9

Good

8,006 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

British Airways

6.7

Okay

7,583 reviews

Delta

7.9

Good

8,006 reviews

Reviews

1 / 20

6.0

Good

Jim,Nov 2025

AVL - ATL

Related info for your journey

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 $623, Lufthansa can have you in London Heathrow Airport from San Antonio in 12h 25m. 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 43% 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

Ilford

Hounslow

Southend-on-Sea

Harrow

Eastleigh

Dartford

Dover

Winchester

Croydon

Orpington

Northampton

Watford

Hayes

Borehamwood

Broadway

Aylesbury

Chipping Norton

Horley

Kingston upon Thames

Wembley

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for San Antonio to Heathrow

Dallas/Fort Worth to Heathrow flights

Hobby to Heathrow flights

George Bush Intcntl to Heathrow flights

Austin to Heathrow flights

Dallas/Fort Worth to Gatwick flights

Love Field to Heathrow flights

Hobby to Gatwick flights

Hobby to London City flights

Dallas/Fort Worth to Stansted flights

Dallas/Fort Worth to London City flights

George Bush Intcntl to Gatwick flights

Austin to Gatwick flights

George Bush Intcntl to London City flights

Austin to London City flights

George Bush Intcntl to Stansted flights

Dallas/Fort Worth to Luton flights

Austin to Stansted flights

Love Field to Gatwick flights

San Antonio to London City flights

San Antonio to Gatwick flights

El Paso to Heathrow flights

Harlingen to Heathrow flights

El Paso to London City flights

El Paso to Gatwick flights

McAllen to Heathrow flights

San Antonio to Stansted flights

Hobby to Luton flights

Lubbock to Heathrow flights

Corpus Christi to Heathrow flights

McAllen to London City flights

McAllen to Gatwick flights

Midland to Heathrow flights

Love Field to London City flights

Lubbock to Gatwick flights

Midland to Gatwick flights

Abilene to Heathrow flights

Brownsville to Heathrow flights

College Station to Heathrow flights

Hobby to Southend flights

Killeen to Heathrow flights

Killeen to Gatwick flights

Killeen to London City flights

Other flights to Heathrow

John F Kennedy Intl to Heathrow flights

Boston to Heathrow flights

Portland to Heathrow flights

San Diego to Heathrow flights

Newark to Heathrow flights

Seattle to Heathrow flights

London Heathrow Airport to Paris Orly Airport flights

London Heathrow Airport to Inverness flights

London Heathrow Airport to Seville flights

London Heathrow Airport to Newcastle upon Tyne flights

London Heathrow Airport to Athens flights

London Heathrow Airport to Manchester flights

London Heathrow Airport to Madrid flights

London Heathrow Airport to Brussels Bruxelles-National Airport flights

London Heathrow Airport to Frankfurt am Main Airport flights

London Heathrow Airport to Hamburg flights

London Heathrow Airport to Barcelona-El Prat Airport flights

London Heathrow Airport to Oslo Gardermoen Airport flights

London Heathrow Airport to Naples flights

London Heathrow Airport to Edinburgh flights

London Heathrow Airport to Amsterdam flights

London Heathrow Airport to Lyon flights

London Heathrow Airport to Rome Fiumicino Airport flights

London Heathrow Airport to Milan Malpensa Airport flights

Top 6 airlines flying from San Antonio to Heathrow

Airline	Cheapest	Average	Flexibility	On-time
American Airlines	Cheapest$530	Average$882	FlexibilityNo cancel fee	On-time71%
United Airlines	Cheapest$531	Average$930	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$531	Average$713	FlexibilityNo cancel fee	On-timeN/A
British Airways	Cheapest$566	Average$867	FlexibilityNo cancel fee	On-time70%
Virgin Atlantic	Cheapest$600	Average$832	FlexibilityNo cancel fee	On-time72%
Iberia	Cheapest$668	Average$956	FlexibilityNo cancel fee	On-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.

$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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from San Antonio to Heathrow with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Cheap flight deals from San Antonio to Heathrow

Cheapest flights from San Antonio to HeathrowExplore 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 17, 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 December 17, 2025.

Find flight deals from San Antonio to Heathrow

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from San Antonio to London Heathrow Airport that are best for you.

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.

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.

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?

What is the cheapest month to book a flight from San Antonio to London Heathrow Airport?

What is the cheapest time of day to fly from SAT to LHR?

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

Reviews of airlines servicing Heathrow

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?

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

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

Can I find deals for flights from San Antonio to Heathrow that include hotel bookings?

How can I find direct flights from San Antonio to Heathrow?

Can I find deals for business class flights from San Antonio to Heathrow?

What is the cheapest month to book a flight from San Antonio to London Heathrow Airport?

Traveling to a place near London Heathrow Airport?

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.

Top 6 airlines flying from San Antonio to Heathrow

100% Free

Book with Flexibility

Travel Smart

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 17, 2025.