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Cheap flights from San Antonio to London from £243

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 11/10. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags
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Find the cheapest flights from San Antonio to London

Cheap return flights

Enter your travel dates to find the best prices.
Aer Lingus Logo
09:00 - 08:05
SAT
-
LHR
17h 05m
2 stops
Aer Lingus Logo
07:40 - 21:13
LHR
-
SAT
19h 33m
2 stops
£573Aer Lingus
Thu, 15 Oct - Mon, 19 Oct
Aer Lingus Logo
09:00 - 08:05
SAT
-
LHR
17h 05m
2 stops
Aer Lingus Logo
07:40 - 21:13
LHR
-
SAT
19h 33m
2 stops
£619Aer Lingus
Tue, 13 Oct - Mon, 19 Oct
Iberia Logo
12:56 - 08:15
SAT
-
LHR
13h 19m
1 stop
Iberia Logo
07:30 - 20:49
LHR
-
SAT
19h 19m
2 stops
£649Iberia
Wed, 30 Dec - Thu, 14 Jan
Iberia Logo
12:56 - 08:15
SAT
-
LHR
13h 19m
1 stop
Iberia Logo
07:30 - 20:49
LHR
-
SAT
19h 19m
2 stops
£650Iberia
Wed, 30 Dec - Thu, 14 Jan
Delta Logo
18:22 - 11:40
SAT
-
LHR
12h 18m
1 stop
Delta Logo
08:40 - 21:32
LHR
-
SAT
18h 52m
2 stops
£651Delta
Mon, 26 Oct - Tue, 10 Nov
Delta Logo
18:22 - 11:40
SAT
-
LHR
12h 18m
1 stop
Delta Logo
08:40 - 21:32
LHR
-
SAT
18h 52m
2 stops
£652Delta
Mon, 26 Oct - Tue, 10 Nov
Scandinavian Airlines Logo
13:41 - 17:40
SAT
-
LHR
22h 59m
2 stops
Scandinavian Airlines Logo
06:40 - 01:27
LHR
-
SAT
23h 47m
2 stops
£653Scandinavian Airlines
Wed, 28 Oct - Sun, 1 Nov
Scandinavian Airlines Logo
13:41 - 17:40
SAT
-
LHR
21h 59m
2 stops
Scandinavian Airlines Logo
06:40 - 22:27
LHR
-
SAT
21h 47m
2 stops
£653Scandinavian Airlines
Wed, 9 Dec - Sun, 13 Dec
Delta Logo
10:45 - 08:45
SAT
-
LHR
16h 00m
2 stops
Delta Logo
11:45 - 23:20
LHR
-
SAT
17h 35m
2 stops
£654Delta
Wed, 30 Dec - Thu, 14 Jan
Delta Logo
10:45 - 08:45
SAT
-
LHR
16h 00m
2 stops
Delta Logo
11:45 - 23:20
LHR
-
SAT
17h 35m
2 stops
£655Delta
Wed, 30 Dec - Thu, 14 Jan

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Aer Lingus flights from San Antonio to London Heathrow Airport

Our best Aer Lingus deals on San Antonio to London Heathrow Airport flight tickets
Aer Lingus
15 Oct
SAT09:00San Antonio
17h 05m
2 stops
LHR08:05London Heathrow
19 Oct
LHR07:40London Heathrow
19h 33m
2 stops
SAT21:13San Antonio
£573
Aer Lingus
13 Oct
SAT09:00San Antonio
17h 05m
2 stops
LHR08:05London Heathrow
19 Oct
LHR07:40London Heathrow
19h 33m
2 stops
SAT21:13San Antonio
£619
Aer Lingus
13 Jul
SAT13:32San Antonio
20h 28m
2 stops
LHR16:00London Heathrow
18 Jul
LHR19:40London Heathrow
34h 30m
2 stops
SAT00:10San Antonio
£1,161

Iberia flights from San Antonio to London Heathrow Airport

Our best Iberia deals on San Antonio to London Heathrow Airport flight tickets
Iberia
30 Dec
SAT12:56San Antonio
13h 19m
1 stop
LHR08:15London Heathrow
14 Jan
LHR07:30London Heathrow
19h 19m
2 stops
SAT20:49San Antonio
£649
Iberia
30 Dec
SAT12:56San Antonio
13h 19m
1 stop
LHR08:15London Heathrow
14 Jan
LHR07:30London Heathrow
19h 19m
2 stops
SAT20:49San Antonio
£650
Iberia
23 Sept
SAT12:41San Antonio
14h 24m
1 stop
LHR09:05London Heathrow
30 Sept
LHR11:30London Heathrow
17h 20m
2 stops
SAT22:50San Antonio
£658

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 7 July 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

Cheapest return flight

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Thu 15/10

09:00-08:05

2 stops17h 05m

London Heathrow

Mon 19/10

07:40-21:13

2 stops19h 33m

£573

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Tue 13/10

09:00-08:05

2 stops17h 05m

London Heathrow

Mon 19/10

07:40-21:13

2 stops19h 33m

£619

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 30/12

12:56-08:15

1 stop13h 19m

London Heathrow

Thu 14/1

07:30-20:49

2 stops19h 19m

£649

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 30/12

12:56-08:15

1 stop13h 19m

London Heathrow

Thu 14/1

07:30-20:49

2 stops19h 19m

£650
Fastest return journey

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 26/10

18:22-11:40

1 stop12h 18m

London Heathrow

Tue 10/11

08:40-21:32

2 stops18h 52m

£651

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Mon 26/10

18:22-11:40

1 stop12h 18m

London Heathrow

Tue 10/11

08:40-21:32

2 stops18h 52m

£652

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 28/10

13:41-17:40

2 stops22h 59m

London Heathrow

Sun 1/11

06:40-01:27

2 stops23h 47m

£653

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 9/12

13:41-17:40

2 stops21h 59m

London Heathrow

Sun 13/12

06:40-22:27

2 stops21h 47m

£653

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 30/12

10:45-08:45

2 stops16h 00m

London Heathrow

Thu 14/1

11:45-23:20

2 stops17h 35m

£654

San AntonioLondon

SAT - LHR

SATLHR

San Antonio

Wed 30/12

10:45-08:45

2 stops16h 00m

London Heathrow

Thu 14/1

11:45-23:20

2 stops17h 35m

£655

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 £434. The month of February is another great option to travel to London Heathrow Airport, with average flight prices from San Antonio averaging around £491.

How far in advance should I book a flight from San Antonio 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 £668 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 £486 on momondo.

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

As of July 2026, prices for San Antonio to London Heathrow Airport flights are approximately 30% 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 40m

Direct flights

None
The fastest flight from San Antonio to London Heathrow Airport takes 11h 40m
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

Frequently asked questions about flying from San Antonio to London Heathrow Airport

  • 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 40m.

  • 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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