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Cheap flights from Seattle to Sofia from $355

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 6/29. 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
0 bags

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Find the cheapest flights from Seattle to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
6:40 pm - 2:00 pm
SEA
-
SOF
33h 20m
1 stop
Multiple Airlines Logo
7:00 am - 11:45 am
SOF
-
SEA
14h 45m
1 stop
$531Multiple Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
6:50 pm - 11:10 pm
SEA
-
SOF
18h 20m
1 stop
United Airlines Logo
6:10 am - 12:20 pm
SOF
-
SEA
16h 10m
1 stop
$532United Airlines
Sun, Apr 5 - Tue, Apr 14
United Airlines Logo
8:00 am - 12:10 pm
SEA
-
SOF
18h 10m
2 stops
United Airlines Logo
6:20 am - 12:20 pm
SOF
-
SEA
16h 00m
1 stop
$537United Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
8:00 am - 12:10 pm
SEA
-
SOF
18h 10m
2 stops
United Airlines Logo
12:55 pm - 4:59 pm
SOF
-
SEA
14h 04m
1 stop
$539United Airlines
Wed, Apr 1 - Wed, Apr 8
Multiple Airlines Logo
6:40 pm - 2:00 pm
SEA
-
SOF
33h 20m
1 stop
Multiple Airlines Logo
7:00 am - 4:47 pm
SOF
-
SEA
19h 47m
2 stops
$541Multiple Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
6:50 pm - 11:10 pm
SEA
-
SOF
18h 20m
1 stop
United Airlines Logo
12:55 pm - 11:27 pm
SOF
-
SEA
20h 32m
2 stops
$544United Airlines
Sun, Apr 5 - Tue, Apr 14
United Airlines Logo
8:00 am - 12:10 pm
SEA
-
SOF
18h 10m
2 stops
United Airlines Logo
1:50 pm - 9:53 pm
SOF
-
SEA
42h 03m
2 stops
$545United Airlines
Wed, Apr 1 - Wed, Apr 8
United Airlines Logo
2:10 pm - 6:05 pm
SEA
-
SOF
17h 55m
1 stop
United Airlines Logo
6:10 am - 4:59 pm
SOF
-
SEA
20h 49m
1 stop
$546United Airlines
Wed, Apr 1 - Fri, Apr 10
United Airlines Logo
8:42 am - 11:10 pm
SEA
-
SOF
28h 28m
2 stops
United Airlines Logo
6:20 am - 12:19 am
SOF
-
SEA
27h 59m
2 stops
$547United Airlines
Wed, Apr 1 - Fri, Apr 10
United Airlines Logo
8:42 am - 11:10 pm
SEA
-
SOF
28h 28m
2 stops
United Airlines Logo
12:55 pm - 11:27 pm
SOF
-
SEA
20h 32m
2 stops
$549United Airlines
Wed, Apr 1 - Tue, Apr 14

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Apr 5
SEA6:50 pmSeattle/Tacoma Intl
18h 20m
1 stop
SOF11:10 pmSofia
Apr 14
SOF6:10 amSofia
16h 10m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$532
United Airlines
Apr 1
SEA8:00 amSeattle/Tacoma Intl
18h 10m
2 stops
SOF12:10 pmSofia
Apr 8
SOF6:20 amSofia
16h 00m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$537
United Airlines
Apr 1
SEA5:00 amSeattle/Tacoma Intl
32h 10m
2 stops
SOF11:10 pmSofia
Apr 10
SOF6:10 amSofia
20h 49m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$539

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Apr 1
SEA2:10 pmSeattle/Tacoma Intl
22h 40m
1 stop
SOF10:50 pmSofia
Apr 14
SOF6:10 amSofia
16h 10m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$550
Lufthansa
Apr 1
SEA2:10 pmSeattle/Tacoma Intl
22h 40m
1 stop
SOF10:50 pmSofia
Apr 10
SOF6:10 amSofia
20h 49m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$551
Lufthansa
Apr 5
SEA6:50 pmSeattle/Tacoma Intl
18h 20m
1 stop
SOF11:10 pmSofia
Apr 13
SOF7:00 pmSofia
27h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$558

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 February 9, 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

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

6:40 pm-2:00 pm

1 stop33h 20m

Sofia

Wed 4/8

7:00 am-11:45 am

1 stop14h 45m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 4/5

6:50 pm-11:10 pm

1 stop18h 20m

Sofia

Tue 4/14

6:10 am-12:20 pm

1 stop16h 10m

$532

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$537

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Wed 4/8

12:55 pm-4:59 pm

1 stop14h 04m

$539

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

6:40 pm-2:00 pm

1 stop33h 20m

Sofia

Wed 4/8

7:00 am-4:47 pm

2 stops19h 47m

$541

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 4/5

6:50 pm-11:10 pm

1 stop18h 20m

Sofia

Tue 4/14

12:55 pm-11:27 pm

2 stops20h 32m

$544

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Wed 4/8

1:50 pm-9:53 pm

2 stops42h 03m

$545

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

2:10 pm-6:05 pm

1 stop17h 55m

Sofia

Fri 4/10

6:10 am-4:59 pm

1 stop20h 49m

$546

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:42 am-11:10 pm

2 stops28h 28m

Sofia

Fri 4/10

6:20 am-12:19 am

2 stops27h 59m

$547

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:42 am-11:10 pm

2 stops28h 28m

Sofia

Tue 4/14

12:55 pm-11:27 pm

2 stops20h 32m

$549

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 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 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 $771 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 $598 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

17h 20m

Direct flights

None
The fastest flight from Seattle to Sofia takes 17h 20m
There are no direct flights from Seattle to Sofia. There are no popular flight routes from Seattle to Sofia.
Search flight deals

  • 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 17h 20m, 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
LufthansaPriceFrom $537Free CancellationRating
6.8
7,779 reviews
Search Lufthansa flights
Air FrancePriceFrom $555Free CancellationRating
7.4
1,531 reviews
Search Air France flights
Turkish AirlinesPriceFrom $587Free CancellationRating
7.3
4,212 reviews
Search Turkish Airlines flights
KLMPriceFrom $615Free CancellationRating
7.7
1,451 reviews
Search KLM flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
9,267 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
Turkish Airlines
Lufthansa
KLM
United Airlines
Air France