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Cheap flights from London Heathrow Airport to San Antonio from £321

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 22/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAT
15 Mar — 22 Mar1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to San Antonio

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to San Antonio
Explore the most affordable flight options available from Heathrow to San Antonio. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 13 February 2026.

Tue 6/1010:20
LHR
-
SAT
2 stops18h 58m
Scandinavian Airlines
Wed 14/1012:10
SAT
-
LHR
2 stops23h 30m
Scandinavian Airlines
Deal found 11/2£596
Mon 1/619:30
LHR
-
SAT
2 stops34h 18m
Scandinavian Airlines
Mon 15/614:51
SAT
-
LHR
2 stops21h 39m
Scandinavian Airlines
Deal found 12/2£611
Wed 9/906:40
LHR
-
SAT
2 stops22h 38m
Scandinavian Airlines
Sun 13/916:10
SAT
-
LHR
2 stops20h 20m
Scandinavian Airlines
Deal found 12/2£658
Fri 27/206:40
LHR
-
SAT
3 stops23h 19m
Multiple Airlines
Sat 7/306:00
SAT
-
LHR
3 stops24h 55m
Multiple Airlines
Deal found 13/2£676
Mon 9/318:00
LHR
-
SAT
2 stops34h 59m
Multiple Airlines
Fri 20/313:22
SAT
-
LHR
2 stops36h 08m
Multiple Airlines
Deal found 11/2£688
Wed 13/518:40
LHR
-
SAT
2 stops36h 00m
Scandinavian Airlines
Mon 18/514:27
SAT
-
LHR
2 stops19h 33m
Scandinavian Airlines
Deal found 11/2£688
Mon 2/318:30
LHR
-
SAT
3 stops35h 29m
Multiple Airlines
Wed 4/306:00
SAT
-
LHR
3 stops21h 20m
Multiple Airlines
Deal found 10/2£698
Wed 11/312:15
LHR
-
SAT
3 stops26h 12m
Multiple Airlines
Tue 31/310:22
SAT
-
LHR
3 stops27h 58m
Multiple Airlines
Deal found 10/2£701

Find flight deals from Heathrow to San Antonio

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to San Antonio (SAT). 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 13 February 2026.

Round-trip from

£611

One-way from

£321

Popular in

December

Cheapest in

March

Average price

£755
Scandinavian Airlines
  • Scandinavian Airlines
  • 1/6-15/6
  • 4 total stops
  • 55h 57m total
  • London to San Antonio
Search Deals
22/4
  • 22/4
  • 3 total stops
  • 42h 14m total
  • London to San Antonio
Search Deals
Highest demand for flights based on searches. 3% potential increase in price (£21 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£18 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to San Antonio 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 858,174 searches. Data last updated 13 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Antonio that are best for you.

Fly from

Heathrow

Fly to

San Antonio

Route

Depart

Return

Price

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Mon 1/6

06:40-22:31

2 stops21h 51m

San Antonio

Mon 15/6

14:51-16:25

3 stops19h 34m

£689

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Mon 2/3

18:30-23:59

3 stops35h 29m

San Antonio

Wed 4/3

06:00-09:20

3 stops21h 20m

£698

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Sun 1/3

18:40-00:37

2 stops35h 57m

San Antonio

Wed 1/4

16:10-18:30

2 stops20h 20m

£716

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Thu 14/5

06:40-00:40

2 stops24h 00m

San Antonio

Mon 18/5

14:27-16:25

3 stops19h 58m

£730

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 11/3

09:00-09:27

3 stops29h 27m

San Antonio

Tue 31/3

13:22-10:40

2 stops15h 18m

£754

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 11/3

09:30-22:57

2 stops18h 27m

San Antonio

Mon 16/3

12:17-09:45

2 stops16h 28m

£773

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Mon 13/4

18:00-10:50

2 stops22h 50m

San Antonio

Mon 4/5

16:16-11:35

1 stop13h 19m

£800

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 22/4

21:10-09:24

3 stops42h 14m

£321

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Thu 23/4

13:05-09:24

2 stops26h 19m

£395

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 11/3

06:00-09:27

3 stops32h 27m

£397

Flights are sorted by cheapest return flights first.

Deals found on 11/2

Showing 1-10 of 16 results
1
2

Best time to book a flight from Heathrow to San Antonio

Have a flexible travel schedule? Discover the best time to fly to San Antonio from Heathrow with our price prediction graph.
Estimated return 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 London Heathrow Airport to San Antonio

How far ahead should I book a flight from London Heathrow Airport to San Antonio?

Use this chart to determine the optimal time to book a return flight from Heathrow to San Antonio. Price data was last updated on 6 February 2026.

To ensure you get the cheapest price possible for a flight from London Heathrow Airport to San Antonio, you should look to book at least 48 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 London Heathrow Airport to San Antonio?

Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Antonio (average of £325). Flying from London Heathrow Airport to San Antonio in July is currently the most expensive (average of £544). 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 for a return flight from London Heathrow Airport to San Antonio?

Reviews of airlines servicing San Antonio

Get insights into the airlines that provide service to San Antonio. 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 San Antonio. Reviews last updated 13 February 2026.
See what other customers who have flown with Finnair, Virgin Atlantic, andUnited Airlines from London Heathrow Airport to San Antonio have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Finnair
7.6
Good
1,362 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Virgin Atlantic
7.5
Good
678 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
United Airlines
7.4
Good
9,285 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
Scandinavian Airlines
7.3
Good
1,682 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights
British Airways
6.7
Okay
7,736 reviews
Finnair
7.6
Good
1,362 reviews
Check prices

Boarding

7.7

Overall

7.6

Entertainment

6.9

Comfort

7.4

Food

6.7

Crew

8.2

Reviews

1 / 20
2.0
Mediocre

Vlad-Valentin,Jan 2026

LHR - YVR

baggage allowance was different between the outgoing and inbound flights

Related info for your journey

Find useful and relevant information for your journey from Heathrow to San Antonio. 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 into for flights to San Antonio from London Heathrow?

    If you book a flight to San Antonio from London Heathrow, you will be flying to San Antonio, which is the city’s only airport. San Antonio (SAT) is located 7.6 mi from the center of San Antonio. There are 0 flights from London Heathrow to San Antonio per day from 6 different airlines.

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

    For as low as £689, Scandinavian Airlines can have you in San Antonio from London Heathrow Airport in 21h 51m. The distance from London Heathrow Airport to San Antonio is about 4967 mi.

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

    According to our current data, Finnair (£480), Scandinavian Airlines (£571), and United Airlines (£657) offers the cheapest pricing from London Heathrow Airport to San Antonio. These flights start at 42% lower than the current average price 3 months from now.

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

    Yes. In addition to deals on Heathrow to San Antonio flights, Cheapflights offers holiday packages that include both flights and hotel.

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to San Antonio.

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

    Yes. Cheapflights offers flight deals from Heathrow to San Antonio 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 London Heathrow Airport to San Antonio?

    Currently, December is the cheapest month in which you can book a flight from London Heathrow Airport to San Antonio (average of £325). Flying from London Heathrow Airport to San Antonio in July is currently the most expensive (average of £544). 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

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.

Top 6 airlines flying from Heathrow to San Antonio

Discover the top 6 airlines that operate flights from Heathrow to San Antonio. 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 858,174 searches. Data last updated 13 February 2026.
AirlineCheapestAverageFlexibilityOn-time
FinnairCheapest£480Average£701FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Scandinavian AirlinesCheapest£571Average£701FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
United AirlinesCheapest£657Average£771FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Virgin AtlanticCheapest£682Average£857FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£696Average£825FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£696Average£839FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

Fly with Cheapflights

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How does Cheapflights help users find flights from Heathrow to San Antonio?

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to San Antonio from Heathrow today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Heathrow to San Antonio?

Cheapflights helps you find that perfect flight to San Antonio from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to San Antonio with no change fees?

Certainly. Search results for flights to San Antonio from Heathrow shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Heathrow to San Antonio become cheaper?

Of course! You can now track prices for flights from Heathrow to San Antonio and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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