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Cheap flights from London Heathrow Airport to San Antonio from £421

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 29/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — SAT
2 Jun — 9 Jun1
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 3 May 2026.

Wed 20/519:30
LHR
-
SAT
2 stops34h 18m
Scandinavian Airlines
Mon 31/812:10
SAT
-
LHR
2 stops24h 20m
Scandinavian Airlines
Deal found 30/4£683
Tue 9/618:40
LHR
-
SAT
2 stops35h 12m
Scandinavian Airlines
Mon 15/614:40
SAT
-
LHR
2 stops21h 00m
Scandinavian Airlines
Deal found 1/5£683
Thu 21/506:40
LHR
-
SAT
2 stops23h 08m
Scandinavian Airlines
Sun 30/812:10
SAT
-
LHR
2 stops39h 10m
Scandinavian Airlines
Deal found 30/4£699
Thu 11/613:05
LHR
-
SAT
3 stops34h 57m
Multiple Airlines
Mon 22/619:42
SAT
-
LHR
3 stops34h 13m
Multiple Airlines
Deal found 2/5£711
Thu 10/918:40
LHR
-
SAT
2 stops35h 35m
Scandinavian Airlines
Mon 14/914:10
SAT
-
LHR
2 stops21h 30m
Scandinavian Airlines
Deal found 30/4£733
Tue 23/618:45
LHR
-
SAT
2 stops32h 28m
Multiple Airlines
Tue 11/812:10
SAT
-
LHR
1 stop12h 35m
Multiple Airlines
Deal found 30/4£741

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 3 May 2026.

Round-trip from

£683

One-way from

£421

Popular in

December

Cheapest in

January

Average price

£915
Scandinavian Airlines
  • Scandinavian Airlines
  • 20/5-31/8
  • 4 total stops
  • 58h 38m total
  • London to San Antonio
Search Deals
29/5
  • 29/5
  • 3 total stops
  • 43h 47m total
  • London to San Antonio
Search Deals
Highest demand for flights based on searches. 1% potential increase in price (£12 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£20 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 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 3 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to San Antonio that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Fri 12/6

06:40-23:52

2 stops23h 12m

San Antonio

Fri 19/6

14:40-16:00

2 stops19h 20m

£830

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Tue 15/9

07:05-23:18

3 stops22h 13m

San Antonio

Sun 20/9

14:10-17:40

2 stops21h 30m

£864

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Sat 3/10

06:40-00:15

2 stops23h 35m

San Antonio

Wed 21/10

12:10-16:25

3 stops22h 15m

£867

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 13/5

10:05-18:42

1 stop14h 37m

San Antonio

Thu 16/7

13:43-12:50

1 stop17h 07m

£951
Fastest return journey

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Thu 10/9

08:00-17:44

2 stops15h 44m

San Antonio

Mon 14/9

14:15-07:45

1 stop11h 30m

£955

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Sat 3/10

08:00-15:38

1 stop13h 38m

San Antonio

Wed 21/10

09:00-06:55

2 stops15h 55m

£958

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Fri 26/6

06:00-21:13

2 stops21h 13m

San Antonio

Thu 2/7

09:00-12:40

2 stops21h 40m

£992

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 1/7

13:40-21:13

1 stop13h 33m

San Antonio

Wed 22/7

07:00-10:40

1 stop21h 40m

£993
Cheapest one-way

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Wed 17/6

13:05-05:00

2 stops21h 55m

£614

LondonSan Antonio

LHR - SAT

LHRSAT

London Heathrow

Thu 3/9

10:00-21:16

1 stop17h 16m

£649

Flights are sorted by cheapest return flights first.

Deals found on 30/4

Showing 1-10 of 17 resultsSorted by cheapest first
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?

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 47 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Antonio (average of £731). Flying from London Heathrow Airport to San Antonio in December is currently the most expensive (average of £1,160). 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 3 May 2026.
See what other customers who have flown with Scandinavian Airlines,United Airlines, andVirgin Atlantic 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.
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Scandinavian Airlines
7.4
Good
1,767 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
United Airlines
7.4
Good
9,683 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Virgin Atlantic
7.4
Good
688 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
Lufthansa
6.8
Okay
7,965 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.
British Airways
6.7
Okay
7,940 reviews
Scandinavian Airlines
7.4
Good
1,767 reviews
Check prices

Comfort

7.3

Crew

8.0

Entertainment

6.7

Food

6.7

Overall

7.4

Boarding

7.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Mar 2026

CPH - ORD

The flight was smooth for the most part. Please remove those extra pillows on the headrest of the chair. They make your neck hurt by pushing your head forward. We flew on two other planes that did not have that feature and the seats were very comfortable. The crew members were very nice, and the pizza twists were really good.

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 £830, Scandinavian Airlines can have you in San Antonio from London Heathrow Airport in 23h 12m. 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, United Airlines (£335), Scandinavian Airlines (£549), and Finnair (£578) offers the cheapest pricing from London Heathrow Airport to San Antonio. These flights start at 61% 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, January is the cheapest month in which you can book a flight from London Heathrow Airport to San Antonio (average of £731). Flying from London Heathrow Airport to San Antonio in December is currently the most expensive (average of £1,160). 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

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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 3 May 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest£335Average£774FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
Scandinavian AirlinesCheapest£549Average£811FlexibilityNo cancel feeOn-time77%
Search Scandinavian Airlines flights
FinnairCheapest£578Average£882FlexibilityNo cancel feeOn-time76%
Search Finnair flights
Virgin AtlanticCheapest£680Average£896FlexibilityNo cancel feeOn-time72%
Search Virgin Atlantic flights
British AirwaysCheapest£699Average£868FlexibilityNo cancel feeOn-time70%
Search British Airways flights
LufthansaCheapest£699Average£904FlexibilityNo cancel feeOn-time76%
Search Lufthansa flights

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

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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.

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