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Cheap flights from Seattle to Sofia from $302

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sofia departing on 10/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Turkish Airlines Logo
7:15 pm - 3:00 pmSEA  Seattle/Tacoma Intl-SOF Sofia
33h 45m1 stop Istanbul
Turkish Airlines Logo
3:50 pm - 5:20 pmSOF  Sofia-SEA Seattle/Tacoma Intl
35h 30m1 stop Istanbul
$722Turkish Airlines
Sun, Sep 20 - Tue, Oct 6
Turkish Airlines Logo
7:15 pm - 3:00 pmSEA  Seattle/Tacoma Intl-SOF Sofia
33h 45m1 stop Istanbul
Turkish Airlines Logo
3:50 pm - 5:20 pmSOF  Sofia-SEA Seattle/Tacoma Intl
35h 30m1 stop Istanbul
$736Turkish Airlines
Sun, Sep 20 - Tue, Oct 6
Multiple Airlines Logo
10:10 am - 6:20 pmSEA  Seattle/Tacoma Intl-SOF Sofia
22h 10m2 stops Vancouver Intl Munich Franz Josef Strauss
Multiple Airlines Logo
2:00 pm - 1:00 pmSOF  Sofia-SEA Seattle/Tacoma Intl
33h 00m1 stop Munich Franz Josef Strauss
$736Multiple Airlines
Tue, Jan 12 - Tue, Jan 26
Turkish Airlines Logo
7:05 pm - 8:55 pmSEA  Seattle/Tacoma Intl-SOF Sofia
15h 50m1 stop Istanbul
Turkish Airlines Logo
9:40 am - 5:10 pmSOF  Sofia-SEA Seattle/Tacoma Intl
17h 30m1 stop Istanbul
$737Turkish Airlines
Tue, Jan 12 - Tue, Jan 26
Multiple Airlines Logo
7:00 am - 10:55 pmSEA  Seattle/Tacoma Intl-SOF Sofia
29h 55m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
Multiple Airlines Logo
6:25 am - 6:22 pmSOF  Sofia-SEA Seattle/Tacoma Intl
21h 57m2 stops Frankfurt am Main Vancouver Intl
$744Multiple Airlines
Tue, Jan 12 - Tue, Jan 26
United Airlines Logo
11:00 am - 1:15 pmSEA  Seattle/Tacoma Intl-SOF Sofia
16h 15m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss
United Airlines Logo
6:25 am - 11:21 pmSOF  Sofia-SEA Seattle/Tacoma Intl
26h 56m3 stops Frankfurt am Main Denver Intl San Francisco
$761United Airlines
Tue, Jan 12 - Tue, Jan 26
Multiple Airlines Logo
6:50 pm - 6:40 pmSEA  Seattle/Tacoma Intl-SOF Sofia
13h 50m1 stop Munich Franz Josef Strauss
Multiple Airlines Logo
6:25 am - 6:22 pmSOF  Sofia-SEA Seattle/Tacoma Intl
21h 57m2 stops Frankfurt am Main Vancouver Intl
$791Multiple Airlines
Tue, Sep 15 - Thu, Dec 3
United Airlines Logo
2:50 pm - 6:20 pmSEA  Seattle/Tacoma Intl-SOF Sofia
17h 30m1 stop Munich Franz Josef Strauss
United Airlines Logo
6:25 am - 12:00 pmSOF  Sofia-SEA Seattle/Tacoma Intl
15h 35m1 stop Frankfurt am Main
$796United Airlines
Wed, Nov 4 - Sat, Nov 7
Lufthansa Logo
6:50 pm - 6:40 pmSEA  Seattle/Tacoma Intl-SOF Sofia
13h 50m1 stop Munich Franz Josef Strauss
Lufthansa Logo
12:55 pm - 4:59 pmSOF  Sofia-SEA Seattle/Tacoma Intl
14h 04m1 stop Munich Franz Josef Strauss
$807Lufthansa
Sun, Oct 11 - Sun, Oct 18
Lufthansa Logo
6:50 pm - 6:40 pmSEA  Seattle/Tacoma Intl-SOF Sofia
13h 50m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:20 am - 12:20 pmSOF  Sofia-SEA Seattle/Tacoma Intl
16h 00m1 stop Frankfurt am Main
$816Lufthansa
Tue, Oct 6 - Fri, Oct 16

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SWISS flights from Seattle to Sofia

Our best SWISS deals on Seattle to Sofia flight tickets
SWISS
Sep 15
SEA3:30 pmSeattle/Tacoma Intl
32h 50m
2 stops
SOF10:20 amSofia
Sep 22
SOF1:05 pmSofia
40h 10m
2 stops
SEA7:15 pmSeattle/Tacoma Intl
$859
SWISS
Oct 8
SEA1:19 pmSeattle/Tacoma Intl
37h 36m
2 stops
SOF12:55 pmSofia
Oct 19
SOF3:40 pmSofia
37h 12m
2 stops
SEA6:52 pmSeattle/Tacoma Intl
$865

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Oct 11
SEA6:50 pmSeattle/Tacoma Intl
13h 50m
1 stop
SOF6:40 pmSofia
Oct 18
SOF12:55 pmSofia
14h 04m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$807
Lufthansa
Sep 6
SEA6:50 pmSeattle/Tacoma Intl
18h 25m
1 stop
SOF11:15 pmSofia
Sep 22
SOF12:55 pmSofia
14h 04m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$817
Lufthansa
Sep 15
SEA6:50 pmSeattle/Tacoma Intl
13h 50m
1 stop
SOF6:40 pmSofia
Sep 22
SOF6:10 amSofia
20h 49m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$824

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 6, 2026.
Use the filters below to find and compare flights from Seattle to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 9/20

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 10/6

3:50 pm-5:20 pm

1 stop35h 30m

$722

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 9/20

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 10/6

3:50 pm-5:20 pm

1 stop35h 30m

$736

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 1/12

10:10 am-6:20 pm

2 stops22h 10m

Sofia

Tue 1/26

2:00 pm-1:00 pm

1 stop33h 00m

$736

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 1/12

7:05 pm-8:55 pm

1 stop15h 50m

Sofia

Tue 1/26

9:40 am-5:10 pm

1 stop17h 30m

$737

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 1/12

7:00 am-10:55 pm

2 stops29h 55m

Sofia

Tue 1/26

6:25 am-6:22 pm

2 stops21h 57m

$744

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 1/12

11:00 am-1:15 pm

2 stops16h 15m

Sofia

Tue 1/26

6:25 am-11:21 pm

3 stops26h 56m

$761

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 9/15

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Thu 12/3

6:25 am-6:22 pm

2 stops21h 57m

$791

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Sat 11/7

6:25 am-12:00 pm

1 stop15h 35m

$796
Quickest round-trip

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 10/11

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Sun 10/18

12:55 pm-4:59 pm

1 stop14h 04m

$807

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 10/6

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Fri 10/16

6:20 am-12:20 pm

1 stop16h 00m

$816

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Sofia from

How to get the cheapest flight ticket from Seattle to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Sofia?

Prices are currently low for flights on this route.

Typical prices usually range from $738 to $1,009.
The lowest price recently found on this route was $722.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Seattle is in October. Flight prices, which tend to average around $587, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Seattle during January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $615.

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

You are more likely to see cheaper flights to Sofia from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $755 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Seattle for as low as $673 on momondo.

When to book flights from Seattle to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Sofia according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Sofia (SEA to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Sofia

Fastest flight time

15h 05m

Direct flights

None
The fastest flight from Seattle to Sofia takes 15h 05m
There are no direct flights from Seattle to Sofia. There are no popular flight routes from Seattle to Sofia.
Search flight deals

Frequently asked questions about flying from Seattle to Sofia

  • How far is Seattle/Tacoma Intl to Sofia by plane?

    There are 5850.6 mi between Seattle/Tacoma Intl and Sofia. Flights usually cover this in 15h 05m, depending on flying conditions and air traffic around both airports.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport are updated daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sofia Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sofia Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sofia Airport.

  • What documentation or ID do you need to fly to Sofia Airport?

    The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Seattle to Sofia?

Best airlines flying from Seattle to Sofia

Compare and see reviews for airlines that fly from Seattle to Sofia with momondo
Airline
Rating
Free Cancellation
Price
KLMPriceFrom $538Free CancellationRating
7.8
1,555 reviews
Search KLM flights
LufthansaPriceFrom $540Free CancellationRating
6.8
8,177 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $570Free CancellationRating
7.4
4,468 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
10,074 reviews
Search United Airlines flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
Bansko
Borovets
Velingrad
Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Sofia?

It is quick and easy to find Seattle to Sofia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sofia that suits you.

Can I find flights from Seattle to Sofia with flexible booking policies on momondo?

All flight searches from Seattle to Sofia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Sofia?

Once all potential Seattle to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo
Lufthansa
Turkish Airlines
KLM
United Airlines