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Find First Class Flights from Seattle to London

1 adult
1 adult, First, 0 bags

KAYAK searches hundreds of travel sites at once for first class flights from Seattle to London

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to London, as well as popular online travel agencies
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Cheap First Class Flight Deals from Seattle to London

 
These are the cheapest deals for flights from Seattle to London currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 first class round-trip flight deals to London

Wed, Jul 15 - Wed, Jul 22
British Airways Logo
8:20 pm - 1:45 pm
SEA
-
LHR
9h 25mnonstop
British Airways Logo
4:30 pm - 6:25 pm
LHR
-
SEA
9h 55mnonstop
$5,505British Airways
Mon, Jul 6 - Mon, Jul 20
British Airways Logo
1:30 pm - 6:45 am
SEA
-
LHR
9h 15mnonstop
British Airways Logo
4:30 pm - 6:25 pm
LHR
-
SEA
9h 55mnonstop
$5,544British Airways
Tue, Jun 30 - Tue, Jul 7
British Airways Logo
1:30 pm - 6:45 am
SEA
-
LHR
9h 15mnonstop
British Airways Logo
9:50 am - 11:35 am
LHR
-
SEA
9h 45mnonstop
$5,651British Airways
Tue, Jun 30 - Tue, Jul 7
British Airways Logo
1:30 pm - 6:45 am
SEA
-
LHR
9h 15mnonstop
British Airways Logo
9:50 am - 11:35 am
LHR
-
SEA
9h 45mnonstop
$5,688British Airways
Mon, Jun 29 - Tue, Jul 21
British Airways Logo
1:30 pm - 6:45 am
SEA
-
LHR
9h 15mnonstop
British Airways Logo
9:50 am - 11:35 am
LHR
-
SEA
9h 45mnonstop
$5,754British Airways
Mon, Aug 24 - Fri, Sep 18
British Airways Logo
8:20 pm - 1:45 pm
SEA
-
LHR
9h 25mnonstop
British Airways Logo
9:50 am - 11:35 am
LHR
-
SEA
9h 45mnonstop
$6,315British Airways
Wed, Aug 12 - Tue, Aug 25
Multiple Airlines Logo
7:40 am - 10:55 am
SEA
-
LHR
19h 15m
1 stop
Multiple Airlines Logo
3:15 pm - 8:30 am
LHR
-
SEA
25h 15m
1 stop
$6,993Multiple Airlines
Wed, Jul 15 - Wed, Jul 22
British Airways Logo
7:10 am - 12:10 pm
SEA
-
LHR
21h 00m
1 stop
British Airways Logo
10:45 am - 6:00 pm
LHR
-
SEA
15h 15m
1 stop
$6,994British Airways
Tue, Aug 18 - Sun, Aug 30
British Airways Logo
1:30 pm - 6:45 am
SEA
-
LHR
9h 15mnonstop
British Airways Logo
4:30 pm - 6:25 pm
LHR
-
SEA
9h 55mnonstop
$7,022British Airways
Wed, Jun 17 - Wed, Jul 8
American Airlines Logo
10:27 am - 9:05 am
SEA
-
LHR
14h 38m
1 stop
American Airlines Logo
9:50 am - 11:35 am
LHR
-
SEA
9h 45mnonstop
$7,102American Airlines

Good to Know - First Class Flights from Seattle to London

Low seasonAugust
Average price round-trip$6,416
Good deal round-trip$5,751
Best time to beat the crowds with an average 34% drop in price.
Most popular time to fly with an average 30% increase in price.
(avg. price over the last 2 weeks)
or less

When to book first class flights to London

Are your dates flexible? We break down the daily and monthly prices for first class flights to London, so you can find the best time to fly.
Average price per month
Flight prices as travel date approaches

KAYAK’s Insights & Trends for Seattle to London First Class Flights

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

What is the cheapest month to fly First Class from Seattle to London?

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

The cheapest month for First Class flights from Seattle to London is January, where tickets cost $5,275 (round-trip) on average. On the other hand, the most expensive months are June and October, where the average cost of round-trip tickets is $8,000 and $6,977 respectively.

Which airlines offer First Class tickets between Seattle and London?

There are 2 airlines that fly First Class from Seattle to London. They are: Alaska Airlines and British Airways. The cheapest price of all airlines flying this route was found with Alaska Airlines at $2,383 for a round-trip flight. On average, the best prices for flying First Class on this route can be found at Alaska Airlines.

FAQs for First Class Seattle to London Flights

  • How much is a first class ticket from Seattle to London?

    The price of a first class flight ticket between Seattle and London depends on many factors, like when the ticket was booked, the departure date, season and much more. The average price for all bookings made on KAYAK for this route over the last 2 weeks is $6,416 for a round-trip.

  • Is it cheaper to fly business or first class between Seattle and London?

    Business class tickets are usually cheaper and that is true for this route, with an average price of $3,121 compared to $6,416 for a round-trip flight.

  • What is the best airline when flying first class between Seattle and London?

    The highest-rated airline by KAYAK users offering first class flights for this route is Delta, with an overall rating of 7.9.

KAYAK's Tips for Finding Cheap First Class Flights from Seattle to London

  • Try flying direct if you’re looking to save, as direct first class tickets are cheaper on average.

Reviews of the Top 5 Airlines Flying First Class from Seattle to London

 
See real verified KAYAK customer reviews for airlines flying to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Seattle to London. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly first class to London? 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 8397 reviews
7.8Comfort
7.8Entertainment
8.1Boarding
8.5Crew
7.2Food
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. 😀

Crew was nice, meal was good. Entertainment had to be rebooted 3 times and still did not work. Turns out there was residue on screen, it needed to be cleaned to prevent the touchscreen buttons from continuously activating. I had entertainment for the last 45 minutes of a 5 hour 45 minute flight. Really unacceptable for first class. Flight attendent indicated your cleaning solution creates this problem. Seems as if this is widely known, you should be using a different product or cleaning better. Really really disappointing which simply added to the wi fi on your planes with reliably never ever works.

The return flight was great. The flight out to CDG was overbooked, and we were forced to check in a small carry-on at the get immediately before the flight, before getting out the stuff we needed on the plane.

The first class flight attendant was awful to everyone. Very rude; no customer service. She should not be working in first class.

Snacks and included beverages were appreciated. Boarding went smoothly. Plenty of overhead bin space. Seats get very uncomfortable after a couple of hours. After waiting 10 painful minutes for my walker, a very nice Delta guest agent pushed me in a wheelchair to the gate. It was finally delivered to me after another 15 minutes . Our checked bag was on the carousel long b4 I was able to retrieve it. Fortunately it was still there but somewhere along the way the straps we used to secure it were removed and and were not reattached. Wish I had made note of the agents name.

Smaller plane for a longer flight than my first one. Doesn’t make sense.

The cabin temperature was nice and cool. The wifi was not working.

Love delta smaller commuter plane so no entertainment and paid wifi on MKE-LGA leg was extremely unreliable and slow

Could not get my connecting flight boarding pass until four hrs before departure! Ver annoying especially since the staff could not explain why!

Seating and zone. The minor I went with didn’t even seat close to me

My seat 3G did not go down fully and the buttons were not working properly

Food has been disappointing in both legs of flight to india

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

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

Food was the worst I’ve had on a VA flight. Normally it’s a lot better

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

These are one of the older seat arrangements facing away from the windows! Not particularly convenient sets. No storage spaces. NO COAT HANGING HOOKS. Inconvenient business class seat compared to any other airlines of similar class. Staff are excellent! Extremely professional, friendly. Food is good too.

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.

The staff was not very polite but the flight was very very nice and comfortable and the entertainment was great

Everything is good except the seats are tightened no rooms for the legs,

The flight crew was exceptionally friendly and helpful. Also the seats were comfortable and roomier than many other airlines.

The plane's pilots, including the captain himself, thanked me for the flight. I know it's just marketing, but it was really nice to see these people. It's a great idea. Airplane food is never "good," but the entire crew and flight organization were top-notch. I really liked Delta, and I think I've traveled all over the world, and that was something new for me. Maybe even the old planes, the B767, but next time I have a choice, Delta will be my first choice. Thank you, a satisfied passenger :)

Middle seats SUCK!!!! I paid more money than I should have because of your terrible site Kayak.com. I'll try to use your competitors going forward. I am so disappointed you would play off business class.com as business class seats

The boarding was efficient. The entertainment system was a bit unstable but Air France has a good selection of movies.

Not consistent with the food quality (I mean taste not freshness)

Safe and stable made me sleepy and I slept and dreamt 😂😂😂😂

Food was really mediocre for premium economy in comparison to other airlines… the crew was nowhere to be found… 14 hour flight…

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

3 hour delay but out of their control. App said I get vouchers but when I applied for them, they were nowhere to be found in my account

They cancelled our connecting flight resulting in another layover reaching our final destination 8 hours later than scheduled.

The Check-in process at CDG was confusing and the crew was not helpful. But the flight was on-time and that is most important to me.

On-time arrivals and departures. Crew helpful and friendly. Yet everything costs extra: seat selection, food, even airphones!

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

Screen didn't work, and neither did the button to tilt the seat even though the seat was comfortable

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

The customer service was unbeatable from the wheelchair assist team to the flight attendants. The pilot also did an excellent job managing the turbulence.

Boarding process was chaotic. Confusion over Boarding gates: gate 55 or gate 56 ???. Unnecessary standing in long lines to board. Better to call out Boarding groups one at a time and everyone else to sit. Airline only has 2 Boarding groups 1-3 and 4-9. That causes over crowding and chaos

Lady next to me was coughing profusely the entire flight, other lady moved seats because of it, 8 hours of that during an overnight flight is a bit much.

3.5 hr delay leaving Pittsburgh, notifications for which were incomplete and untimely. Connecting flight was automatically switched to one requiring more than a 30 hour layover! After waiting in a long queue, customer service reduced layover to 11 hours and also set up an earlier standby. The standby had empty seats, but the gate agent couldn't change our tickets! On top of all that my luggage was lost and has yet to even be located, much less returned 5 (FIVE!) days later. Too bad there's no rating below poor.

Canceled flight late London to Florence. Help at airport very poor. Treated poorly. Had to sleep in the airport. Lost bags- still do not have them. Horrible. I should be reimbursed!

The seats are extra cramped if you are taller than 5’8! Spring for the extra legroom seats for sure if you have a long flight!

Very disappointed with British Airways. It has been over 24 hours and I still have not received my checked baggage or any proper update. Customer support has been unresponsive, making the situation even more frustrating. Poor baggage handling and lack of communication seriously impacted my travel experience.

Flight was good but temp in the cabin was cold.

I like American Airlines and their safety record. They provide quality service and a feel safe enough to prefer American Airlines over other carriers even if I have to pay a little more.

Cancelled flight and re booked seats were a downgrade. British Airways said the upgrade was t available but when I checked it was but then they wouldn’t make it right

Boarding was orderly, pilot and flight attendants were nice, entertainment options were good, and low sodium meals were quite tasty.

Everything you need to know for your flight to London

Cabin class types available on flights from Seattle to London

Cabin classes available on flights from Seattle to London. Prices are the lowest found on KAYAK over the last 7 days. Price and availability is not guaranteed.