SAT - LHR

$322 Find Cheap Flights from San Antonio to London Heathrow Airport - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Antonio to Heathrow departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$749
Typical prices: $600-$881
United Airlines
Tue 11/3Thu 11/5
SAT - LHR • 2 stops
Cheapest one-way
$213
Typical prices: $332-$596
Aer Lingus
Thu 8/13
SAT - LHR • 2 stops
Top airlines
Cheapest • from $749 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between San Antonio and Heathrow. You'll need at least 1 connection.
Insights
Insights
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Insights
Top layover airports
Cheapest • Avg $658 (round-trip)
Shortest trip • 11h 35m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 22% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 36% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from San Antonio to Heathrow (SAT-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Antonio to Heathrow that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from San Antonio to Heathrow

Tue, Nov 3 - Thu, Nov 5
United Airlines Logo
7:28 am - 11:50 am
SAT
-
LHR
22h 22m
2 stops
United Airlines Logo
7:30 am - 8:53 pm
LHR
-
SAT
19h 23m
2 stops
$749United Airlines
Tue, Nov 3 - Thu, Nov 5
United Airlines Logo
7:28 am - 11:50 am
SAT
-
LHR
22h 22m
2 stops
United Airlines Logo
7:30 am - 8:53 pm
LHR
-
SAT
19h 23m
2 stops
$750United Airlines
Wed, Sep 30 - Fri, Oct 9
Multiple Airlines Logo
12:10 pm - 8:35 am
SAT
-
LHR
14h 25m
2 stops
Multiple Airlines Logo
6:00 am - 9:13 pm
LHR
-
SAT
21h 13m
2 stops
$855Multiple Airlines
Mon, Dec 7 - Thu, Dec 10
Multiple Airlines Logo
10:00 am - 7:10 am
SAT
-
LHR
15h 10m
2 stops
Multiple Airlines Logo
6:30 am - 5:33 pm
LHR
-
SAT
17h 03m
2 stops
$859Multiple Airlines
Wed, Dec 30 - Wed, Jan 13
Delta Logo
10:45 am - 11:40 am
SAT
-
LHR
18h 55m
1 stop
Delta Logo
10:00 am - 11:20 pm
LHR
-
SAT
19h 20m
2 stops
$870Delta
Wed, Dec 30 - Wed, Jan 13
Delta Logo
10:45 am - 11:40 am
SAT
-
LHR
18h 55m
1 stop
Delta Logo
10:00 am - 11:20 pm
LHR
-
SAT
19h 20m
2 stops
$871Delta
Wed, Sep 30 - Fri, Oct 9
British Airways Logo
7:05 pm - 2:25 pm
SAT
-
LHR
13h 20m
1 stop
British Airways Logo
4:25 pm - 12:11 am
LHR
-
SAT
13h 46m
1 stop
$885British Airways
Tue, Nov 17 - Mon, Nov 23
British Airways Logo
12:45 pm - 10:35 am
SAT
-
LHR
15h 50m
2 stops
British Airways Logo
6:45 pm - 8:34 am
LHR
-
SAT
19h 49m
2 stops
$891British Airways
Mon, Sep 21 - Tue, Oct 6
Virgin Atlantic Logo
4:21 pm - 11:20 am
SAT
-
LHR
12h 59m
1 stop
Virgin Atlantic Logo
9:20 am - 5:14 pm
LHR
-
SAT
13h 54m
1 stop
$905Virgin Atlantic
Wed, Dec 16 - Wed, Dec 23
Virgin Atlantic Logo
12:53 pm - 7:15 am
SAT
-
LHR
12h 22m
1 stop
Virgin Atlantic Logo
4:00 pm - 12:28 am
LHR
-
SAT
14h 28m
1 stop
$936Virgin Atlantic
Booking Insights

KAYAK's insights & trends for San Antonio to Heathrow flights

Get data-powered insights and trends into flights from San Antonio to Heathrow to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from San Antonio to London Heathrow Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Antonio to London Heathrow Airport departing in November.

Flight prices are typical for this route right now.

Flights to London Heathrow Airport from San Antonio usually cost between $678 and $934 in November.
The lowest price found in the past 5 days was $749 on United Airlines (Nov 3-Nov 5).

What is the cheapest month to fly from San Antonio to London Heathrow Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Antonio to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from San Antonio to London Heathrow Airport is October, where tickets cost $580 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,282 and $1,167 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Antonio to London Heathrow Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from San Antonio to London Heathrow Airport, you should book around 2 weeks before departure, which saves you about 22% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 11 weeks before departure.

Good to know

Low season

February

Cheapest flight

$322
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 36% lower on average.
Flight from San Antonio to London Heathrow Airport

When to book flights from San Antonio to Heathrow

Are your dates flexible? Find out the best times to travel from San Antonio to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking San Antonio to London Heathrow Airport flights

  • What is the cheapest flight from San Antonio to London Heathrow Airport?

    In the last 5 days, the lowest price for a flight from San Antonio to London Heathrow Airport was $322 for a one-way ticket and $749 for a round-trip.

  • Do I need a passport to fly between San Antonio and London Heathrow Airport?

    Yes, you’ll need a passport to travel to London Heathrow Airport from San Antonio.

  • Which aircraft models fly most regularly from San Antonio to London Heathrow Airport?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from San Antonio to London Heathrow Airport?

    SkyTeam, Star Alliance, and oneworld are the airline alliances operating flights between San Antonio and London Heathrow Airport, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from San Antonio to London, Delta or Virgin Atlantic?

    The two airlines most popular with KAYAK users for flights from San Antonio to London are Delta and Virgin Atlantic. With an average price for the route of $656 and an overall rating of 7.8, Delta is the most popular choice. Virgin Atlantic is also a great choice for the route, with an average price of $780 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from San Antonio to London Heathrow Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from San Antonio to London Heathrow Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Antonio to London Heathrow Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London Heathrow Airport from San Antonio is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from San Antonio to London Heathrow Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London Heathrow Airport with an airline and back to San Antonio with another airline. Booking your flights between San Antonio and LHR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from San Antonio to London Heathrow Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London Heathrow Airport from San Antonio up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from San Antonio to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from San Antonio to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from San Antonio to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.8
DeltaOverall score based on 8488 reviews
7.2Food
8.5Crew
8.1Boarding
7.8Entertainment
7.8Comfort
Airline reviews

The crew were efficient. The pilots seemed professional. It was a bit chilly in our seats. The sheet provided weren’t very helpful.

8.0 ExcellentAnonymous, May 2026
ATL - LHR
Read more Delta reviews

The crew were efficient. The pilots seemed professional. It was a bit chilly in our seats. The sheet provided weren’t very helpful.

The Boarding process was great. Particularly since my wife and I require assistance. The flight attendants were amazing. We travel frequently; they honestly were a cut above. 😀

Plenty of leg room, temperature was great and staff was excellent. Would do it more often.

Passengers need to check in big baggage instead of bringing on the plane. That cause inconvenience for everyone. Otherwise flight was good.

Great. Very smooth. Plenty of information. However, wish they would give out a menu in advance of making a dinner choice like other international airlines. The flight attendant says chicken or pasta and there are details about ingredients or spices requiring the passenger to ask which requires the flight attendant to answer many times. So easy to solve this problem. P

All fine save for the abominable catering. Really gone downhill. We found it all inedible.

Late flight caused a missed connection, had to be put on a later international flight without my requested vegan meal.

Half the bathrooms assigned to economy were out of action

The crew members were great. The food was good. Entertainment was average - Could use a wider and better selections of movies and series.

Flight was cancelled after 3 1/2 hours. Support for rebooking was overwhelmed. Lost first class tickets and to fly economy.

Great staff great experience, made a 2 hour delay very bearable

I was my pleasure to fly virgin on my birthday for my first solo trip ever 🫶🏼

Overall, flight was excellent but check in was very slow for Premium Economy. Economy queue was shorter but we weren't allowed to use it.

Good overall. Cannot fault the airlines. I have had better entertainment systems before ie ice in Emirates but it was not too bad. Food was decent and staff were friendly.

Miami airport needs more thorough signage. It was a long walk from my transport point to the check in desk,

Flight took off an hour late. Had to stay on the tarmac for half an hour after landing. Both annoying.

The crew was very good. However, the equipment was a bit dated. Some of the electronics were not working. To top it, three bags didn’t arrive with me. Two of them were delivered a day later. I’m still waiting for the third bag, I was so looking forward to this virgin Atlantic flight, but, I am disappointed.

My only complaint is that the pocket in front of me was ripped and my things, like iPad and airline magazines, kept slipping to the floor.

Flight delayed yet again. Crew apathetic and unhelpful re affect on connecting flight.

I think Virgin is one of the best flying experiences, especially from/to the UK. The staff are so helpful and fun, the food is good, seats comfortable, goof entertainment and great value. Check in and boarding is pretty pain free. I also find that the other passengers are generally so kind and considerate than when I've flown other airlines.

I was very disappointed with my experience at the United Airlines baggage check. The representative was rude and unhelpful. I was required to remove approximately 1.5 pounds from my two checked bags, even though it was a very small amount over the limit. The interaction was unnecessarily unpleasant, and I expected much better customer service. I hope United will review this incident and provide additional customer service training to its staff.

Cree was organized and pleasant. Plane had good seating but as it’s a shuttle toilets hadn’t been thoroughly cleaned (eg. bins too full)

Some flight attendants were great others were cranky. Seats were very tight and sitting on an aisle was very hard as the carts and people walking constantly bumped shoulder and arm.

Although the flight was delayed the crew and the flight itself were very good. Couldn't fault anything and after the disappointment of being abandoned in the US by BA it was a welcome relief to travel with United

Liked fold flat bed. Didn’t like having no window. Didn’t like poor choice of food and being served dinner very late, hours after take off of a 7:40pm flight. Servers not friendly. Food horrible in business class.

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Fight was delayed an hour due to operational issues ,then further delayed due to ground control for a total of about 1.30 hours. Salad was completely frozen and flatware was so cold you could barely handle it. Crew was friendly and professional and the flight was smooth. The aircraft was clean and well-serviced.

Waited for our plane from HNL so we didn't miss connection. AMAZING Service for that, then really clean plane. Nice airline attendants.

The Polaris experience is top notch. From departure lounge to arrival lounge. Everything was top notch. One of the best first class experience

United domestic flight was better than international flight. There was no switch to control Ac In international united flight. Food was also average,

Comfort in premium economy is worth it for long hauls especially on the 787-9P Dreamliner with the modern updates. The food was okay. All 4 of us selected the same meal, 2 of us had very dry hard to cut chicken, the other 2 were tender and good. The sides/salad/dessert all very good as far as airline food goes. Crew were very attentive. Will be hard to ever go back to regular economy!

Crew was great! Food sub-bar, tepid & flavorless. No snack options on trans-atlantic flight. Premium Economy seats ok, leg rest wouldn’t stay in place.

Entertainment system did not function. USB ports did not function. Wi-Fi did not function. Terrible trifecta…

Luggage did not make it onto my plane. Business seats were economy with empty row seat. Just horrible experience. Why would the company allow for transfers that don’t give employees enough time to transfer luggages??

For an long range economy flight I feel more space and more meal options need to be offered for flights over 5 hours

The check in agents in PHL and gate agents had to have been the rudest women that I have ever encountered; the agent weighing the bags at check in screamed continuously at all of the guests as did the woman at the gate.I have Executive Platinum status with AA and fly a lot with AA but these ladies were the absolute worst I had the displeasure to encounter!

B-class on an old plane with antiquated amenities and poor service. Landed in Rome w/o bag that didn’t make the connection (plenty of time in London). Bag will come to hotel NOT the day it lands but the following night!! Still waiting for bag…BA had nothing to offer in support and couldn’t even tell me their comp, told to submit receipts and then I’ll learn what is or isn’t covered.

It's a long flight and that is always difficult. I was comfortable and well. The movies available were great and the crew was good.

Not too impressed with them to be honest. They had forgotten my gf meal, despite the fact that the app had notified me that it was sorted. Apparently there is a ‘glitch’ in the system, according to one of the stewardesses, and has been for a while. Also the legroom in economy is way too small (and I’m a slight person) and are very uncomfortable. An extra Internal flight I booked via the app, had not even given me the option to order a meal, so was unaware of that and left without food on a 9 hr. flight !! Don’t think I’ll use AA again after this.

A 50 minutes flight that is delayed over 90 minutes kills every connection, thank you American Airlines

As I remember my last BA flight - mediocre at best. Uncomfortable with poor and minimal food and drinks. Screen broke shortly into flight so didn’t have access to entertainment either.

All crew except 1 were excellent. When I asked assistance with business class seat conversion to a bed (not being familiar as never used before but have numerous times with other airlines) crew member helped very reluctantly. I should have told her that business class seat conversion is totally different in each airline such as Delta, New Zealand Air and United. Sorry it was my 1st time with America Airlines. Now I know, I won't bother asking assistance in future.

Nice aircraft. Good crew. Delayed departure from Houston, but arrived on time in London. Main thing I don’t like about flying BA is having to transit through security in London Heathrow. A major pain!

Good service, food and comfort in World Traveller Plus. Entertainment was poor - no wifi on the way out and barely working on the way back. Not a great choice of entertainment on the seat back tv.

My enetertainmnet screen was broken. Lost my bags. Almost missed my flight do to connection issues with (despite a request) ZERO help from crew. Food was edible. Potatoes pretty good even

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Very crowded, no real explanation of food "chicken or pasta?" After dinner no drinks service. Plane was clean, but little help with finding soaces fir luggage to get into overhead bins. Many passengers putting 2 bags, hats, duty free in overhead bins so no space for roll ons

I ordered short ribs for main course. It tasted sweet, really sweet. Horrible.

Surly rude flight attendants. I ordered the chicken and was given a vegetarian meal with no explanation and no opportunity to change it. I tried to order another beverage and was told by the young humorless flight attendant to “wait”. And she never came back. The seats were very uncomfortable and cramped. The last time I flew British Airways was many years ago but I remember it was amazing and the crew were very charming. This was a terrible disappointment given the cost of the flight.

Everything you need to know for your flight from San Antonio to Heathrow

Information on your arrival and departure airports