SAT - LHR

$350 Find Cheap Flights from San Antonio to London Heathrow Airport

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 2/14. 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

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to London.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Antonio to London.
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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

Wed, Nov 19 - Wed, Dec 3
United Airlines Logo
7:07 am - 10:50 amSAT-LHR
21h 43m1 stop
United Airlines Logo
1:25 pm - 3:08 pmLHR-SAT
31h 43m2 stops
$509United Airlines
Find Deal
Wed, Nov 19 - Wed, Dec 3
United Airlines Logo
11:40 am - 10:50 amSAT-LHR
17h 10m2 stops
United Airlines Logo
1:25 pm - 3:08 pmLHR-SAT
31h 43m2 stops
$514United Airlines
Find Deal
Sun, Oct 5 - Fri, Oct 24
Air Canada Logo
6:45 am - 6:30 amSAT-LHR
17h 45m2 stops
Air Canada Logo
4:00 pm - 3:25 pmLHR-SAT
29h 25m2 stops
$516Air Canada
Find Deal
Tue, Nov 4 - Thu, Nov 20
Iberia Logo
3:00 pm - 8:35 amSAT-LHR
11h 35m1 stop
Iberia Logo
2:10 pm - 9:49 pmLHR-SAT
13h 39m1 stop
$519Iberia
Find Deal
Sat, Oct 11 - Fri, Oct 24
Air Canada Logo
7:38 pm - 6:30 amSAT-LHR
28h 52m2 stops
Air Canada Logo
4:00 pm - 3:25 pmLHR-SAT
29h 25m2 stops
$521Air Canada
Find Deal
Wed, Oct 1 - Wed, Oct 8
Delta Logo
11:35 am - 12:05 pmSAT-LHR
18h 30m1 stop
Delta Logo
9:00 am - 10:42 pmLHR-SAT
19h 42m2 stops
$524Delta
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Wed, Oct 1 - Wed, Oct 8
British Airways Logo
11:11 am - 7:40 amSAT-LHR
14h 29m1 stop
British Airways Logo
8:20 am - 3:47 pmLHR-SAT
13h 27m1 stop
$527British Airways
Find Deal
Wed, Oct 1 - Wed, Oct 8
Delta Logo
11:26 am - 8:50 amSAT-LHR
15h 24m2 stops
Delta Logo
11:30 am - 12:20 amLHR-SAT
18h 50m2 stops
$528Delta
Find Deal
Tue, Jan 27 - Thu, Feb 5
British Airways Logo
11:57 am - 7:20 amSAT-LHR
13h 23m1 stop
British Airways Logo
12:35 pm - 11:31 pmLHR-SAT
16h 56m1 stop
$531British Airways
Find Deal
Thu, Oct 30 - Thu, Nov 6
Iberia Logo
10:11 am - 9:15 amSAT-LHR
18h 04m2 stops
Iberia Logo
6:45 pm - 10:38 pmLHR-SAT
33h 53m2 stops
$625Iberia
Find Deal

Everything you should know

Top airlines
United Airlines
Cheapest • from $509 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 32% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
October
Cheapest • 34% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$509
Overall average: $884
United Airlines
Wed 11/19Wed 12/3
SAT - LHR • 1 stop
Cheapest one-way
$350
Typical prices: $908-979
Scandinavian Airlines
Sat 2/14
SAT - LHR • 2 stops
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We hope you love your trip to Heathrow!
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.

What’s the cheapest day of the week to fly from San Antonio to London Heathrow Airport?

The average price of all round-trip flights from San Antonio to London Heathrow Airport clicked on KAYAK for each day over the last 12 months.

When flying from San Antonio to London Heathrow Airport, you should consider leaving on a Thursday and avoid Saturdays if you are looking for the best rates. For your return to San Antonio, you’ll find the best rates on Mondays and the most expensive ones on Thursdays.

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 $629 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,347 and $1,343 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 32% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$350
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 40% increase in price.
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 3 days, the lowest price for a flight from San Antonio to London Heathrow Airport was $350 for a one-way ticket and $509 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 oneworld being the most commonly used for this route.

  • What is the most popular layover when flying to London Heathrow Airport from San Antonio?

    Dallas is the most popular layover city among KAYAK users traveling from San Antonio to London Heathrow Airport.

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

    The two airlines most popular with KAYAK users for flights from San Antonio to London are Delta and United Airlines. With an average price for the route of $1,032 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $939 and an overall rating of 7.4.

  • 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.
7.9
DeltaOverall score based on 7954 reviews
7.9Entertainment
7.9Comfort
8.2Boarding
8.5Crew
7.3Food
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

The newer screen was super cool and had the option to watch many different shows or movies. Crew was polite and helpful. However again, many children screaming bloody murder and kicking my seat, and parents doing nothing about it as usual.

Flight was good and crew was super polite. However, there were around 5 kids screaming the WHOLE 2 hours. I understand kids have to come but parents need to do something to control their children. They make the experience terrible, especially after finishing 16 hour shifts at the hospital I needed some sleep, which I did not get.

Plane was crowded and even when we hit altitude, the plane was hot, not enough air flow.

Flight was delayed and missed my connection Lufthansa didn’t respond.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

A little bit more leg room in premium economy. I am 6’4”.

Overall it was good. I missed my connection but I was put on another flight.

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

Gate agent did not hold flight for connection, provided no assistance to get new flight

Don’t know they cancelled the flight day before I was to leave. They sent a email at 9:00 pm at night saying they cancelled. That is the smooth way to say we don’t want your business! I think they didn’t have enough people booking so they cancelled the flight! It’s all about the money anymore there is no honesty in business.

The flight was canceled 3 hours after original take off time

Pathetic check in experience at JFK. Everything is self check in. Not enough staff present to help with when the check in process or the kiosk gets stuck. Staff present not welcoming or pleasant at all. On the other hand the NY based flight crew was great. Courteous and friendly throughout the flight. Special meals leave a lot to be desired. Kids meals should be made available when kids are flying and same goes for special kids meals too.

Flight was full, and would have preferred an aisle seat, but due to getting a late ticket ,the seat I had was adequate. The flight crew were very help full and hard working. Food and drink were excellent for the 11hr flight. Overall I was pleased with flight, and would recommend British Airways again.

More choices on menu. Seemed only thing offered was Scottish, and while that’s good for the Scot’s it doesn’t help the Americans who don’t like that food. And I really hate it when, during sleep time the attendants have a very loud conversation right over you. Lastly, I paid 5000 dollars for business class, and having to pay more to choose my seat early is really an insult. Seems greedy

The chicken adobo was a little too spicy but good otherwise. My personal opinion. Movie selection could be improved, too many horror movies. Could add a few more chick flicks! The flight was bumpy at times. We arrived a little early too! Flight attendants friendly.

Again flight was awesome except British Airways lost both gate checked luggage’s. Still missing

really bad they refused to check in luggages that I had purchased, even showing them the transaction receipt from british airways app the staff in miami was MEDIOCRE

Crew was great and responsive. Entertainment quit working with about 4 hours remaining on the flight. My seat cushion was broken.

Not very good , the stewardess were unfriendly and they don't like to be bothered. Cos was a night flight and they need to sleep.

It was fortunate that the flight arrived in London in accordance with schedule, and the luggage was promptly transferred to the luggage carousel. However, I find it concerning that even minor issues in economy cabins are prevalent within the industry. American Airlines, in particular, appears to have the least legroom and feels more crowded due to the proximity of neighboring passengers. Additionally, the crew’s adherence to protocol is inconsistent. While they may enforce certain rules set by the FAA on a select few individuals, they often overlook numerous violations, such as failing to reset seat recline during landing.

Easy and organized getting in and out of the flight

We liked the flight but while we purchased an aisle seat, our seats had a different configuration on this flight. A fellow passenger suggested that the airplane had been changed. Too bad we were not informed and had no chance to modify our seat preferences. We were stuck in the window and middle seats with no chance to walk around and go to the bathroom without disturbing our sleeping fellow passenger.

The crew were not very personable. The crew did not serve tea or coffee. The bathroom was not kept clean. Two out of the 5 toilets in the cabin weren't working.

It was extremely cold in the back of the plane. The seats are uncomfortable and space very small. Crew was excellent as usual.

Check in needed to be in person, not nice. Also I won’t do connections in Charlotte again because you need to go through security again and short connections become a problem

Iberia lost my bag, said they found it in another country, said they sent it to me, but never did. Went my whole trip without my stuff, but expecting it to show up because that’s what they said would happen. Their communication sucks, their website sucks, and to top it all off, their seats are small and uncomfortable. They’re bad at their jobs and they should feel bad about themselves. Do not even get me started on the flight home. AVOID!

I described my experience in the previous window. I didn't realize that there would be another opportunity for this flight. Please look at my response in the previous window.

Boarding was 2 1/2 late no explanation Captain said he did not know why, but he rested at home for an extra couple of hours. Food was edible, Nothing more.

I liked the comfort of the plane. It was unexpected from past experiences.

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

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

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

Very caring crew on board. Didn’t have dinner as I was sleeping. Was seating in the emergency row so I had comfortable leg room

Had a nice little suite although I couldn’t close the door (but I didn’t ask anyone to help). 5K is a nice seat and very private (you look in on first class). Enjoyable flight and nice crew.

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