SEA - SOF

$337 Find Cheap Flights from Seattle to Sofia

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 9/13. 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

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Sofia, 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 Sofia, as well as popular online travel agencies
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Flights 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

Sun, Sep 21 - Fri, Oct 10
Turkish Airlines Logo
7:10 pm - 8:25 pmSEA-SOF
15h 15m1 stop
Turkish Airlines Logo
9:15 pm - 10:35 amSOF-SEA
23h 20m1 stop
$591Turkish Airlines
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Wed, Oct 8 - Wed, Oct 15
Turkish Airlines Logo
7:10 pm - 2:45 pmSEA-SOF
33h 35m1 stop
Turkish Airlines Logo
9:25 am - 5:15 pmSOF-SEA
17h 50m1 stop
$599Turkish Airlines
Find Deal
Sat, Aug 16 - Fri, Sep 12
Turkish Airlines Logo
12:30 pm - 2:45 pmSEA-SOF
16h 15m1 stop
Turkish Airlines Logo
3:35 pm - 10:35 amSOF-SEA
29h 00m1 stop
$600Turkish Airlines
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Sat, Nov 22 - Mon, Dec 1
 Logo
8:00 pm - 6:20 pmSEA-SOF
36h 20m2 stops
 Logo
3:00 pm - 11:15 pmSOF-SEA
42h 15m2 stops
Sat, Nov 22 - Mon, Dec 1
United Airlines Logo
11:59 pm - 10:45 pmSEA-SOF
36h 46m2 stops
United Airlines Logo
2:20 pm - 12:10 pmSOF-SEA
31h 50m1 stop
$624United Airlines
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Thu, Jan 22 - Wed, Feb 4
Air Canada Logo
3:40 pm - 6:20 pmSEA-SOF
40h 40m2 stops
Air Canada Logo
6:15 am - 10:06 pmSOF-SEA
25h 51m2 stops
$653Air Canada
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Thu, Jan 22 - Wed, Feb 4
Air Canada Logo
8:00 pm - 6:20 pmSEA-SOF
36h 20m3 stops
Air Canada Logo
6:15 am - 10:06 pmSOF-SEA
25h 51m3 stops
$660Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 22
Lufthansa Logo
6:50 pm - 11:00 pmSEA-SOF
18h 10m1 stop
Lufthansa Logo
6:15 am - 2:16 pmSOF-SEA
18h 01m2 stops
$670Lufthansa
Find Deal
Wed, Oct 8 - Wed, Oct 22
Lufthansa Logo
10:00 am - 1:15 pmSEA-SOF
17h 15m2 stops
Lufthansa Logo
6:15 am - 2:16 pmSOF-SEA
18h 01m2 stops
$675Lufthansa
Find Deal
Wed, Oct 8 - Wed, Oct 22
United Airlines Logo
8:42 am - 11:00 pmSEA-SOF
28h 18m3 stops
United Airlines Logo
6:15 am - 10:16 pmSOF-SEA
26h 01m2 stops
$685United Airlines
Find Deal
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.

What’s the cheapest day of the week to fly from Seattle to Sofia?

The average price of all round-trip flights from Seattle to Sofia clicked on KAYAK for each day over the last 12 months.

For Seattle to Sofia, Saturday is the cheapest day to fly on average and Friday is the most expensive. Flying from Sofia back to Seattle, the best deals are generally found on Sunday, with Friday being the most expensive.

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 2 weeks before departure, which saves you about 38% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 23 weeks before departure.

Good to know

Low seasonApril
Cheapest flight$337
Best time to beat the crowds with an average 26% drop in price.
Most popular time to fly with an average 1% increase in price.
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 3 days, the lowest price for a flight from Seattle to Sofia was $337 for a one-way ticket and $591 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?

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

  • What is the most popular layover when flying to Sofia from Seattle?

    Istanbul is the most popular layover city among KAYAK users traveling from Seattle to Sofia.

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

    The two airlines most popular with KAYAK users for flights from Seattle to Sofia are United Airlines and Turkish Airlines. With an average price for the route of $1,049 and an overall rating of 7.4, United Airlines is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $955 and an overall rating of 7.3.

  • 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 1383 reviews
7.7Comfort
7.1Entertainment
7.3Food
7.8Boarding
8.4Crew
Airline reviews

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

6.0 GoodSimon, Jul 2025STR - AMS
Read more KLM reviews

The baggage drop-off in Stuttgart is bad: after online check-in you cannot use the automated baggage drop off as indicated on the website. You can use the terminals but have to cue to 1 of three open and slowly working counters to drop the bags. took about 45 minutes wait time.

Our first flight was delayed so we missed our connecting flight. However it was easy to book a later flight on their app.

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!

Klm start boarding while somw air issue in the plan

I appreciate that KLM was proactive in informing me of the 2 hour delay which enabled me to replan my travel. It was a bit stressful not knowing whether my connection from Montreal to Ottawa was happening. But the ground and air crew did a good job at comforting and assuring me.

Cabin crew professional, polite and friendly, boarding was seemless, but come on KLM surely you can do better than a pack of cheesy biscuits as an inflight snack

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!

This portion of the flight was through Indigo. A local carrier. So all economy seating. No real service some refreshments for purchase standard economy stuff.

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

Terrible. Delayed 7 hours, and cancelled the flight, leaving me stranded and out of pocket $500 for an alternative last minute flight

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

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.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

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!!!

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

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.

The economy seat was so uncomfortable, had not enough leg room for 13 hours flight, front seat basket was broken and couldn’t hold anything, food quality was horrible( we got food poisoned ) we charged for logged which used to be free. We paid too much for this flight and very disappointed. Turkish air line better to make satisfy and respect people instead of find different way to scam people.

This is really the rating of two flights. JFK to IST then IST to NQZ. New York to Istanbul was good. Good crew and all positives. The flight to Astana was so bad that brought it all down. Crew was nonexistent above the minimum, seats were cramped, and it was hot on the plane. Turkish Airlines seems to be slipping down to US based carriers level.

The 2 agents on the check in counter were super nice , helpful and very polite. Boarding was like a 1 2 3, I would recommend Turkish airlines for your next trip.

Everything was very good, except that the plane was an hour and a half late

flight with heavy turbulence old boeing 777 rest wasnt clean dashboard doesn’t work

Light and recline did not work on my seat. Very uncomfortable and could not read in the dark

Bad experience; they are not good anymore. They charge too much for luggage seat are so uncomfortable, Flight delays which may miss your next flight, they don’t care if you miss the flight or not. Zero customer services for front desk representatives Istanbul's airport I’m not using this airline any more.

I’ve been traveling for 20 years. I tried Turkish airline for the first time horrible horrible service and it would be my last time even if I get offer for a free ticket, I will not accept it. They have races and the worst Flight attendant

It wasn't good. I didn’t understand. They changed 320 dollars for 2 luggage. My ticket was regular and I paid almost 1200.00 dollars. Why they did charge? I want my money back.. thanks Yılmaz polat

Very punctual, the onboard staff was friendly and correct, the flight was fortunately very calm, the toilets were clean, in short, an excellent experience Thanks

Our flight was delayed for over an hour due to weather, and it had already been a long travel day. However, the crew was calm and compassionate, listening to every complaint with genuine concern. They got us home safely without incident, in spite of all of the obstacles. I’m grateful.

Hate their old flights, boatding, food and services. Very poor quality

Insulting. Lufthansa flight from Munich to EWR had us getting our luggage when we were told in Florence that it would follow us to Indianapolis. It did not. Then very slow security in EWR caused me and three other passengers from Lufthansa flight from Munich to miss the boarding closure. Behind me were two elderly grandparents and their ten year old grandson. We were all refused entry on a plane to Indy that was still at the gate. The doors had not even closed inside the terminal yet. No apologies or compensation offered. Not even a meal voucher let alone a free hotel stay for our inconvenience. I m not sure what the other three passengers behind me did ( they were elderly with a grandson, recall), but I stated 12 hours overnight in a chilly EWR airport until next flight to Indy at 850 next morning.

The food could be better, more snacks. And have some plugs to chargue the phone.

The pasta in the evening meal was tasteless. Otherwise, the flight was okay.

Everything was really great just The aircraft was too old and sounded it will break during takeoff

Seating was average for a first class seat. It very modern. I expected better.

Flight was a little late. The crew was courteous, food ok

Bad! Disaster!! The LH419 was cancelled after 4 hrs on board with no AC and no toilets

Poor food on flight between Toronto and Stockholm Airport Toronto too crowded

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

Information on your arrival and departure airports

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