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Cheap flights from San Antonio to London from £161

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Antonio to London departing on 12/5. 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.
Multiple Airlines Logo
06:00 - 19:30
SAT
-
LHR
32h 30m
3 stops
Multiple Airlines Logo
12:15 - 12:27
LHR
-
SAT
29h 12m
3 stops
£452Multiple Airlines
Tue, 10 Mar - Tue, 17 Mar
Lufthansa Logo
17:29 - 17:05
SAT
-
LHR
17h 36m
2 stops
Lufthansa Logo
07:25 - 22:54
LHR
-
SAT
21h 29m
2 stops
£454Lufthansa
Tue, 12 May - Wed, 20 May
Lufthansa Logo
17:29 - 18:25
SAT
-
LHR
18h 56m
2 stops
Lufthansa Logo
06:55 - 20:49
LHR
-
SAT
19h 54m
2 stops
£455Lufthansa
Tue, 12 May - Wed, 20 May
United Airlines Logo
11:43 - 10:50
SAT
-
LHR
17h 07m
2 stops
United Airlines Logo
06:35 - 20:53
LHR
-
SAT
19h 18m
2 stops
£457United Airlines
Wed, 4 Mar - Wed, 11 Mar
United Airlines Logo
11:53 - 10:15
SAT
-
LHR
17h 22m
1 stop
United Airlines Logo
06:35 - 20:53
LHR
-
SAT
19h 18m
2 stops
£459United Airlines
Wed, 18 Mar - Wed, 25 Mar
Delta Logo
12:18 - 06:50
SAT
-
LHR
12h 32m
1 stop
Delta Logo
11:45 - 22:42
LHR
-
SAT
15h 57m
2 stops
£460Delta
Thu, 5 Mar - Tue, 10 Mar
Delta Logo
13:00 - 06:20
SAT
-
LHR
12h 20m
1 stop
Delta Logo
06:20 - 20:30
LHR
-
SAT
19h 10m
2 stops
£462Delta
Wed, 11 Mar - Wed, 18 Mar
United Airlines Logo
14:20 - 11:15
SAT
-
LHR
15h 55m
2 stops
United Airlines Logo
06:35 - 20:53
LHR
-
SAT
19h 18m
2 stops
£463United Airlines
Wed, 18 Mar - Wed, 25 Mar
United Airlines Logo
12:17 - 10:50
SAT
-
LHR
17h 33m
1 stop
United Airlines Logo
08:30 - 22:57
LHR
-
SAT
19h 27m
2 stops
£467United Airlines
Wed, 11 Mar - Thu, 26 Mar
United Airlines Logo
11:53 - 08:25
SAT
-
LHR
15h 32m
2 stops
United Airlines Logo
09:30 - 22:57
LHR
-
SAT
18h 27m
2 stops
£468United Airlines
Wed, 11 Mar - Wed, 18 Mar

Lufthansa flights from San Antonio to London Heathrow Airport

Our best Lufthansa deals on San Antonio to London Heathrow Airport flight tickets
Lufthansa
12 May
SAT17:29San Antonio
17h 36m
2 stops
LHR17:05London Heathrow
20 May
LHR07:25London Heathrow
21h 29m
2 stops
SAT22:54San Antonio
£454
Lufthansa
12 May
SAT17:29San Antonio
18h 56m
2 stops
LHR18:25London Heathrow
20 May
LHR06:55London Heathrow
19h 54m
2 stops
SAT20:49San Antonio
£455
Lufthansa
12 May
SAT17:29San Antonio
18h 56m
2 stops
LHR18:25London Heathrow
28 May
LHR07:25London Heathrow
19h 30m
2 stops
SAT20:55San Antonio
£484

United Airlines flights from San Antonio to London Heathrow Airport

Our best United Airlines deals on San Antonio to London Heathrow Airport flight tickets
United Airlines
4 Mar
SAT11:43San Antonio
17h 07m
2 stops
LHR10:50London Heathrow
11 Mar
LHR06:35London Heathrow
19h 18m
2 stops
SAT20:53San Antonio
£457
United Airlines
18 Mar
SAT11:53San Antonio
17h 22m
1 stop
LHR10:15London Heathrow
25 Mar
LHR06:35London Heathrow
19h 18m
2 stops
SAT20:53San Antonio
£459
United Airlines
18 Mar
SAT14:20San Antonio
15h 55m
2 stops
LHR11:15London Heathrow
25 Mar
LHR06:35London Heathrow
19h 18m
2 stops
SAT20:53San Antonio
£462

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 29 January 2026.
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

Tue 10/3

06:00-19:30

3 stops32h 30m

London Heathrow

Tue 17/3

12:15-12:27

3 stops29h 12m

£452

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/5

17:29-17:05

2 stops17h 36m

London Heathrow

Wed 20/5

07:25-22:54

2 stops21h 29m

£454

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 12/5

17:29-18:25

2 stops18h 56m

London Heathrow

Wed 20/5

06:55-20:49

2 stops19h 54m

£455

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 4/3

11:43-10:50

2 stops17h 07m

London Heathrow

Wed 11/3

06:35-20:53

2 stops19h 18m

£457

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 18/3

11:53-10:15

1 stop17h 22m

London Heathrow

Wed 25/3

06:35-20:53

2 stops19h 18m

£459

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 5/3

12:18-06:50

1 stop12h 32m

London Heathrow

Tue 10/3

11:45-22:42

2 stops15h 57m

£460

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/3

13:00-06:20

1 stop12h 20m

London Heathrow

Wed 18/3

06:20-20:30

2 stops19h 10m

£462

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 18/3

14:20-11:15

2 stops15h 55m

London Heathrow

Wed 25/3

06:35-20:53

2 stops19h 18m

£462

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/3

12:17-10:50

1 stop17h 33m

London Heathrow

Thu 26/3

08:30-22:57

2 stops19h 27m

£467

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 11/3

11:53-08:25

2 stops15h 32m

London Heathrow

Wed 18/3

09:30-22:57

2 stops18h 27m

£468

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 typical price of a round-trip flight between San Antonio and London Heathrow Airport?

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 £420. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £536.

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 £635 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 £494 on momondo.

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

As of January 2026, prices for San Antonio to London Heathrow Airport flights are approximately 14% 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

12h 10m

Direct flights

None
The fastest flight from San Antonio to London Heathrow Airport takes 12h 10m
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.
Search flight deals

  • 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 12h 10m.

  • 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.

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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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