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Cheap flights from San Antonio to London from £451

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to London departing on 2/3. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Cheap return flights

Enter your travel dates to find the best prices.
Scandinavian Airlines Logo
10:57 - 18:30
SAT
-
LHR
25h 33m2 stops
Scandinavian Airlines Logo
06:40 - 00:34
LHR
-
SAT
23h 54m2 stops
£451Scandinavian Airlines
Mon, 2 Mar - Sat, 7 Mar
Scandinavian Airlines Logo
10:57 - 16:25
SAT
-
LHR
23h 28m3 stops
Scandinavian Airlines Logo
06:40 - 00:34
LHR
-
SAT
23h 54m2 stops
£454Scandinavian Airlines
Mon, 2 Mar - Sat, 7 Mar
Scandinavian Airlines Logo
13:40 - 09:20
SAT
-
LHR
37h 40m2 stops
Scandinavian Airlines Logo
06:40 - 22:28
LHR
-
SAT
21h 48m2 stops
£461Scandinavian Airlines
Thu, 22 Jan - Mon, 26 Jan
Virgin Atlantic Logo
13:40 - 09:00
SAT
-
LHR
13h 20m1 stop
Virgin Atlantic Logo
12:30 - 20:25
LHR
-
SAT
13h 55m1 stop
£464Virgin Atlantic
Wed, 21 Jan - Wed, 28 Jan
KLM Logo
18:17 - 11:40
SAT
-
LHR
11h 23m1 stop
KLM Logo
06:30 - 17:22
LHR
-
SAT
16h 52m2 stops
£464KLM
Wed, 21 Jan - Wed, 28 Jan
Delta Logo
10:45 - 09:00
SAT
-
LHR
16h 15m1 stop
Delta Logo
10:00 - 22:55
LHR
-
SAT
18h 55m2 stops
£472Delta
Wed, 11 Feb - Wed, 18 Feb
KLM Logo
10:45 - 07:40
SAT
-
LHR
14h 55m2 stops
KLM Logo
06:30 - 17:22
LHR
-
SAT
16h 52m2 stops
£473KLM
Wed, 21 Jan - Wed, 28 Jan
Delta Logo
10:45 - 08:05
SAT
-
LHR
15h 20m2 stops
Delta Logo
08:40 - 20:25
LHR
-
SAT
17h 45m2 stops
£475Delta
Wed, 11 Feb - Wed, 18 Feb
Scandinavian Airlines Logo
13:40 - 16:00
SAT
-
LHR
20h 20m2 stops
Scandinavian Airlines Logo
06:40 - 22:28
LHR
-
SAT
21h 48m3 stops
£479Scandinavian Airlines
Thu, 22 Jan - Mon, 26 Jan
British Airways Logo
13:40 - 12:15
SAT
-
LHR
17h 35m1 stop
British Airways Logo
19:15 - 19:25
LHR
-
SAT
29h 10m2 stops
£483British Airways
Tue, 10 Mar - Tue, 17 Mar

Virgin Atlantic flights from San Antonio to London Heathrow Airport

Our best Virgin Atlantic deals on San Antonio to London Heathrow Airport flight tickets
Virgin Atlantic
21 Jan
SAT13:40San Antonio
13h 20m
1 stop
LHR09:00London Heathrow
28 Jan
LHR12:30London Heathrow
13h 55m
1 stop
SAT20:25San Antonio
£464
Find similar
Virgin Atlantic
6 Jan
SAT12:55San Antonio
12h 00m
1 stop
LHR06:55London Heathrow
13 Jan
LHR11:30London Heathrow
17h 25m
2 stops
SAT22:55San Antonio
£552
Find similar
Virgin Atlantic
6 Jan
SAT13:40San Antonio
15h 10m
2 stops
LHR10:50London Heathrow
13 Jan
LHR11:30London Heathrow
17h 25m
2 stops
SAT22:55San Antonio
£554
Find similar

KLM flights from San Antonio to London Heathrow Airport

Our best KLM deals on San Antonio to London Heathrow Airport flight tickets
KLM
21 Jan
SAT18:17San Antonio
11h 23m
1 stop
LHR11:40London Heathrow
28 Jan
LHR06:30London Heathrow
16h 52m
2 stops
SAT17:22San Antonio
£464
Find similar
KLM
21 Jan
SAT10:45San Antonio
14h 55m
2 stops
LHR07:40London Heathrow
28 Jan
LHR06:30London Heathrow
16h 52m
2 stops
SAT17:22San Antonio
£473
Find similar
KLM
11 Feb
SAT16:29San Antonio
13h 11m
1 stop
LHR11:40London Heathrow
18 Feb
LHR12:30London Heathrow
13h 55m
1 stop
SAT20:25San Antonio
£492
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from San Antonio to London Heathrow Airport 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, momondo users made 279,928 searches. Data last updated 9 December 2025.
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

Mon 2/3

10:57-18:30

2 stops25h 33m

London Heathrow

Sat 7/3

06:40-00:34

2 stops23h 54m

£451

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 2/3

10:57-16:25

3 stops23h 28m

London Heathrow

Sat 7/3

06:40-00:34

2 stops23h 54m

£454

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 22/1

13:40-09:20

2 stops37h 40m

London Heathrow

Mon 26/1

06:40-22:28

2 stops21h 48m

£461

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 21/1

13:40-09:00

1 stop13h 20m

London Heathrow

Wed 28/1

12:30-20:25

1 stop13h 55m

£464

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 21/1

18:17-11:40

1 stop11h 23m

London Heathrow

Wed 28/1

06:30-17:22

2 stops16h 52m

£464

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/2

10:45-09:00

1 stop16h 15m

London Heathrow

Wed 18/2

10:00-22:55

2 stops18h 55m

£472

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 21/1

10:45-07:40

2 stops14h 55m

London Heathrow

Wed 28/1

06:30-17:22

2 stops16h 52m

£473

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/2

10:45-08:05

2 stops15h 20m

London Heathrow

Wed 18/2

08:40-20:25

2 stops17h 45m

£475

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 22/1

13:40-16:00

2 stops20h 20m

London Heathrow

Mon 26/1

06:40-22:28

3 stops21h 48m

£479

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 10/3

13:40-12:15

1 stop17h 35m

London Heathrow

Tue 17/3

19:15-19:25

2 stops29h 10m

£483

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to London from

How to get the cheapest flight ticket from San Antonio to London Heathrow Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to London Heathrow Airport?

In general, October is the cheapest month to fly from San Antonio to London Heathrow Airport. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £453. The month of August is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £582.

What is the cheapest day to depart on your flight to London Heathrow Airport?

On average, the least expensive day to fly to London Heathrow Airport from San Antonio is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as £747. However, this price may fluctuate depending on the airline, the season, and holidays. Be sure to avoid booking your departure on a Friday as prices are generally higher than usual. According to our data, the average ticket price to London Heathrow Airport on Friday is £1,303.

What is the cheapest time of day to depart on your flight to London Heathrow Airport?

According to our data, the cheapest time of day to fly to London Heathrow Airport is at midday. momondo users have found flights departing from San Antonio to London Heathrow Airport at midday for as low as £927. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are £1,019 on average. Flights to London Heathrow Airport from San Antonio in the morning are generally more expensive because this time of day is more convenient for travellers’ schedules.

How far in advance should I book a flight to London Heathrow Airport?

You are more likely to see cheaper flights to London Heathrow Airport from San Antonio when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around £708 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from San Antonio for as low as £511 on momondo.

How have San Antonio to London Heathrow Airport flight prices changed over time?

As of December 2025, prices for San Antonio to London Heathrow Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from San Antonio to London Heathrow Airport

Are you open to changing your travel dates? Check out the ideal times to fly from San Antonio to London Heathrow Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap San Antonio to London Heathrow Airport (SAT to LHR) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Antonio to London Heathrow Airport

Fastest flight time

11h 25m

Direct flights

None
The fastest flight from San Antonio to London Heathrow Airport takes 11h 25m
There are no direct flights from San Antonio to London Heathrow Airport. There are no popular flight routes from San Antonio to London Heathrow Airport.
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  • How far is San Antonio to London Heathrow by plane?

    A flight from San Antonio to London Heathrow will travel around 4973.6 mi. In terms of flight time, this usually takes a little over 11h 11m.

  • When did momondo last update prices for flights from San Antonio Airport to London Heathrow Airport?

    Prices for flights from San Antonio Airport to London Heathrow Airport refresh daily.

  • How old do you have to be to fly from San Antonio Airport to London Heathrow Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from San Antonio Airport to London Heathrow Airport.

  • What documentation or ID do you need to fly to London Heathrow Airport?

    The necessary travel and health documents for your London Heathrow Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Travelling to a place near London?

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Worthing

Why use momondo?

Why should I use momondo to find a flight deal from San Antonio to London?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from San Antonio to London for you.

Can I find flights from San Antonio to London with flexible booking policies on momondo?

momondo does allow users to show only those flights to London from San Antonio which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from San Antonio to London?

momondo helps you find the best flight between San Antonio and London by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from San Antonio to London right now. Can momondo alert me if prices change?

Price alerts on flights to London from San Antonio are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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