SEA - SOF

$238 Find Cheap Flights from Seattle to Sofia - 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 Seattle to Sofia departing on 11/10. 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
$699
Typical prices: $578-$730
Turkish Airlines
Fri 9/18Sun 10/4
SEA - SOF • 1 stop
Cheapest one-way
$238
Multiple Airlines
Tue 11/10
SEA - SOF • 3 stops
Top airlines
Cheapest • from $699 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Seattle and Sofia. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $634 (round-trip)
Shortest trip • 14h 00m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 4 weeks in advance save around 31% compared to booking last minute.
Insights
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Insights
When to travel
Cheapest • 23% price drop
Most popular
Good to know
Good to know
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We hope you love your trip to Sofia!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Sofia (SEA-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Sofia 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 Seattle to Sofia

Fri, Sep 18 - Sun, Oct 4
Turkish Airlines Logo
7:15 pm - 8:20 pm
SEA
-
SOF
15h 05m
1 stop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
SEA
35h 30m
1 stop
$699Turkish Airlines
Thu, Oct 8 - Mon, Oct 19
Turkish Airlines Logo
7:15 pm - 3:00 pm
SEA
-
SOF
33h 45m
1 stop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
SEA
35h 30m
1 stop
$699Turkish Airlines
Wed, Oct 7 - Mon, Oct 19
Turkish Airlines Logo
7:15 pm - 8:45 am
SEA
-
SOF
27h 30m
1 stop
Turkish Airlines Logo
9:10 pm - 5:20 pm
SOF
-
SEA
30h 10m
1 stop
$699Turkish Airlines
Mon, Nov 2 - Fri, Nov 6
Lufthansa Logo
7:00 am - 6:20 pm
SEA
-
SOF
25h 20m
2 stops
Lufthansa Logo
6:00 am - 1:00 pm
SOF
-
SEA
17h 00m
1 stop
$751Lufthansa
Sun, Jan 10 - Thu, Jan 14
United Airlines Logo
2:50 pm - 10:45 pm
SEA
-
SOF
21h 55m
1 stop
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$751United Airlines
Mon, Nov 2 - Fri, Nov 6
Lufthansa Logo
7:00 am - 6:20 pm
SEA
-
SOF
25h 20m
2 stops
Lufthansa Logo
6:25 am - 7:03 pm
SOF
-
SEA
22h 38m
2 stops
$753Lufthansa
Mon, Jan 11 - Thu, Jan 14
United Airlines Logo
12:15 pm - 6:20 pm
SEA
-
SOF
20h 05m
2 stops
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$756United Airlines
Tue, Jan 12 - Mon, Jan 18
Multiple Airlines Logo
7:00 am - 10:45 pm
SEA
-
SOF
29h 45m
2 stops
Multiple Airlines Logo
3:00 pm - 11:21 pm
SOF
-
SEA
42h 21m
2 stops
$756Multiple Airlines
Sun, Jan 10 - Thu, Jan 14
United Airlines Logo
8:30 am - 6:20 pm
SEA
-
SOF
23h 50m
2 stops
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$756United Airlines
Tue, Jan 12 - Mon, Jan 18
British Airways Logo
12:00 pm - 8:10 pm
SEA
-
SOF
22h 10m
2 stops
British Airways Logo
5:15 pm - 11:25 am
SOF
-
SEA
28h 10m
1 stop
$760British Airways
Booking Insights

KAYAK's insights & trends for Seattle to Sofia flights

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

How much is a round-trip flight from Seattle to Sofia?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Seattle to Sofia departing in October.

Flight prices are below average for this route right now.

Flights to Sofia from Seattle usually cost between $709 and $1,009 in October.
The lowest price found in the past 5 days was $699 on Turkish Airlines (Oct 8-Oct 20).

What is the cheapest month to fly from Seattle to Sofia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Sofia, 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 Seattle to Sofia is October, where tickets cost $582 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $1,147 and $914 respectively.

How far in advance should I book a flight from Seattle to Sofia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Sofia, 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 Seattle to Sofia, you should book around 4 weeks before departure, which saves you about 31% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 22 weeks before departure.

Good to know

Low season

February

Cheapest flight

$238
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from Seattle to Sofia

When to book flights from Seattle to Sofia

Are your dates flexible? Find out the best times to travel from Seattle to Sofia 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 flights from Seattle to Sofia

  • What is the cheapest flight from Seattle to Sofia?

    In the last 5 days, the lowest price for a flight from Seattle to Sofia was $238 for a one-way ticket and $699 for a round-trip.

  • Do I need a passport to fly between Seattle and Sofia?

    Yes

  • Which airports will I be using when flying from Seattle to Sofia?

    On your way to Sofia, you’ll fly out from Seattle/Tacoma Intl. You’ll be landing at Sofia.

  • Which aircraft models fly most regularly from Seattle to Sofia?

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

  • Which airline alliances offer flights from Seattle to Sofia?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Sofia, with SkyTeam being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Sofia, KLM or Turkish Airlines?

    The two airlines most popular with KAYAK users for flights from Seattle to Sofia are KLM and Turkish Airlines. With an average price for the route of $908 and an overall rating of 7.8, KLM is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $681 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Seattle to Sofia?

    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 Seattle to Sofia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Sofia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Seattle 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 Seattle to Sofia?

    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 Sofia with an airline and back to Seattle with another airline. Booking your flights between Seattle and SOF 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 Seattle to Sofia?

    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 Sofia from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Seattle to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Sofia. 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 Seattle to Sofia? 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
KLMOverall score based on 1550 reviews
7.2Entertainment
7.3Food
7.7Comfort
8.4Crew
7.8Boarding
Airline reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

10.0 ExcellentEmily, Jul 2026
ORD - MSP
Read more KLM reviews

I think I previously submitted my feedback about flight lead Katherine in a different field by mistake. Please see those comments. Comments for Hyd to AMS are it was good. The flight lead and service met expectations for satisfactory high quality service but the flight lead did not stand out as exceptional as did the leads on the other two flights so I don’t remember anything specific one way or the other besides the fact I was satisfied.

Had to cancel and rebook, KLM connection was cancelled prior to departure, ended up flying to Munich on non-Delta carrier.

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

They forgot to serve food and the crew was very unfriendly. Never experienced such a bad KLM flight. Usually fly from Toronto. New York was different.

Over 1 Hr delay. No APU so no AC on ground. Plane was hot during boarding and then they closed the doors over 20 minutes before engine start so interior of plane was steamy hot and stuffy. Could have been helped by opening doors until ready to depart.

My flight was delayed by 6 hours then I missed BOTH of my connecting flights, I then had to stay in the AIRPORT at JFK because soooooo many people also suffered from missing flights and there was no hotels available. I would like to be compensated for this experience! I had to stay in the airport for over 16 hours!

Cabin crew were excellent, very proffesional, polite and friendly, in flight snack was underwhelming, a packet of cheese biscuits, im sure KLM could run to a sandwich!

Overall very positive. Boarding was quick and organized. Cabin was clean and seats were reasonably comfortable. Cabin crew was excellent and the meals provided were also of good quality

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

Transfer at CDG to connecting KLM flight to Amsterdam was a NIGHTMARE. LONG WALKWAYS, NO MOVING WALKWAYS, POOR signage, Have to take a train & No staff visible to help navigate the maze. AVOID TRANSFER AT CDG AT ALL COST.

Average at every level . Poor entertainment selection. Boarding was very poor and disorganized. Flight was late by one hour .

Overall it was good. Food was bad. I ordered gluten free vegetarian meal. But I got gluten free chicken for my long flight from Seattle to Istanbul. I don’t eat any kind of meat. Second meal I got eggplant with meat which I couldn’t eat. I don’t understand why we can’t get gluten free vegetarian meal for a 12 hour flight. I eat the bread and that was it.

Bough tickets with luggage, but made me pay at Airport as well

A great airline, no complaints at all. My experience with Cheap Tickets was very disappointing however. Two hours after purchasing the flight they called to tell me that the ticket price had gone up. I’ve never heard of such a thing. That is called false advertising; I will never use this ticketing service again and will warn all friends to never use it.

The food served was frozen salad and hummus. The hot meal was fine. Crew was doing bare minimum

I enjoy flying with Turkish Airlines and such good hospitality among the crew memebers

I did not like the quality of the food and there was no snacks offered between meals.

A little bit more comfort. It’s tight space around the seats. But all else is great and a smooth flight!

Total chaos with baggage check in…..rude staff in Seattle. And faulty seating/entertainment systems. Unable to log in to WiFi desperate being a member. Kept on getting errors. Never again. Definitely not what’s expected from a Star Alliance member airline.

As far as I remember I've selected and payed 65$ for a seat on the aisle. The seat selection got lost and the location was bad.

Flight be on time would be a good start. Then train your flight attendants to be attentive and friendly. This time they completely forgot my row for the measly snack! United, do better!

Our flight was delayed several Times due to mechanical issues. Although I understand this may happen at times, it was very inconvenient and we had to book a hotel for an overnight stay. We were traveling with my 3-yo grandson and waiting at the airport from noon until 6:30pm with no reassurance that our next rescheduled flight would depart, we had to decide what’s best for him. A day later, I found out that I may be able to demand compensation if my flight is delayed more than 4 hours. I will hav to read the fine print next time.

Very comfortable seating and the Flight staff were very attentive. The premium economy section that I was seated in was very clean, updated, and well appointed. I would highly recommend flying United Airlines as this experience was better than the Japan Airlines business class that I flew several months ago.

United needs to step up their game. Delayed flight leaving Seattle, San Francisco. Older aircraft, not very comfortable.

Had to cancel first flight because Airporter Bus took over 3 hrs to get to airport which resulted in an extra $378 dollar fare . Is there anyway I can be reimbursed for initial fare since it was not my fault? Sent from my iPhone EJ Ledet

Ridiculous boarding. Enter the gate, walk down a staircase with bags, exit a building, get on a crowded bus, dropped off a few meters away from the aircraft, walk with bags to another set of stairs to board the aircraft. And all that during a pouring down rain, and with children. Ridiculous!!!

Delayed by 2.5hrs any longer and they would’ve had to honour their own policy for breaking their own rules and regs. Not cool, especially when I have an infant child that needs to stay on a routine and they get schedules.

They had three choices for snacks - but you could only have one - and they ran out of the dark chocolate before they made it all the way down the aisle... Packed flight - limited service.

They opened my checked bag and even though my lock was tsa approved, they loose my lock and left my bag just like that. Incompetent people, very upset about it. I’ll try to avoid traveling with united

Lufthansa no longer offers any refreshments and snacks on short i.e., around 2 hrs flight. We still had full staff stewards/stewardesses. No idea why they were needed as there was no work for them during the flight

The flight was cancelled, so why are you asking me how the flight was?

It would have been nice if my luggage had made it onto my connecting flight as well. Now I have to wait for my luggage to be delivered and that might take a while, which certainly put a damper on the entire experience.

The agent, who took my mother to her gate, kept talking with one of her male coworkers and treating my mother like a sack of potatoes. She was ignoring my questions because she was too busy flirting with her male colleague. This was a very unprofessional behavior. We also had to wait for close to half an hour for an agent to arrive.

Very good flight, only problem is the boarding process where some peoples do not have manners and do not how to fly ( preparing your documents, oversized carry-ons, not understanding or feigning to not understand directives).

Biggest gripes were that the seats were extra narrow as the 4-in-the-middle taper down. As with most flight, too little leg room hurts my aging hips. Also changing the flight time to 3 hours earlier meant that we had a terribly long lay-over in one of the world's most boring airports

German crew were very kind. Food was okay but can be better, especially bread was not good, Garbage collection was very poor.

I really like it and travel to Europe and back with Lufthansa, but it is getting expensive, a bit beyond my me

Great! Great staff, great food, great flight :) Keep up the good work!!!

Not available crew to load the luggage for all the passengers,comon situation for local European destinations , not acceptable situation, never Lufthansa again 😉 🙄

Flight was overbooked. Crew did a great job but passengers weren’t nice and really not patient. Flying in these times is not the best idea tbh.

Everything you need to know for your flight from Seattle to Sofia

Information on your arrival and departure airports