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Cheap flights from Seattle to Sofia from $308

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 5/28. 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.
Air Canada Logo
8:00 am - 12:10 pm
SEA
-
SOF
18h 10m
2 stops
Air Canada Logo
12:55 pm - 10:42 pm
SOF
-
SEA
19h 47m
2 stops
$642Air Canada
Wed, Sep 16 - Wed, Sep 30
Turkish Airlines Logo
7:15 pm - 8:45 am
SEA
-
SOF
27h 30m
1 stop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
SEA
35h 30m
1 stop
$712Turkish Airlines
Sun, Sep 6 - Tue, Sep 22
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
$735Turkish Airlines
Wed, Sep 9 - Wed, Sep 30
Lufthansa Logo
3:10 pm - 6:20 pm
SEA
-
SOF
17h 10m
1 stop
Lufthansa Logo
6:10 am - 12:10 pm
SOF
-
SEA
16h 00m
1 stop
$744Lufthansa
Wed, Nov 4 - Wed, Nov 18
Lufthansa Logo
3:10 pm - 6:20 pm
SEA
-
SOF
17h 10m
1 stop
Lufthansa Logo
6:10 am - 12:10 pm
SOF
-
SEA
16h 00m
1 stop
$746Lufthansa
Wed, Nov 4 - Wed, Nov 18
Turkish Airlines Logo
7:15 pm - 8:45 am
SEA
-
SOF
27h 30m
1 stop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
SEA
35h 30m
1 stop
$748Turkish Airlines
Sun, Sep 6 - Tue, Sep 22
United Airlines Logo
3:51 pm - 10:45 pm
SEA
-
SOF
20h 54m
2 stops
United Airlines Logo
6:10 am - 12:10 pm
SOF
-
SEA
16h 00m
1 stop
$752United Airlines
Wed, Nov 4 - Wed, Nov 18
United Airlines Logo
11:00 am - 1:15 pm
SEA
-
SOF
16h 15m
2 stops
United Airlines Logo
2:00 pm - 12:33 am
SOF
-
SEA
20h 33m
2 stops
$753United Airlines
Wed, Nov 4 - Wed, Nov 18
Lufthansa Logo
6:50 pm - 6:40 pm
SEA
-
SOF
13h 50m
1 stop
Lufthansa Logo
12:55 pm - 4:59 pm
SOF
-
SEA
14h 04m
1 stop
$755Lufthansa
Wed, Sep 9 - Wed, Sep 23
Air Canada Logo
10:10 am - 1:45 pm
SEA
-
SOF
17h 35m
2 stops
Air Canada Logo
6:10 am - 6:22 pm
SOF
-
SEA
22h 12m
2 stops
$760Air Canada
Wed, Nov 4 - Wed, Nov 18

Air Canada flights from Seattle to Sofia

Our best Air Canada deals on Seattle to Sofia flight tickets
Air Canada
Sep 16
SEA8:00 amSeattle/Tacoma Intl
18h 10m
2 stops
SOF12:10 pmSofia
Sep 30
SOF12:55 pmSofia
19h 47m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$642
Air Canada
Nov 4
SEA10:10 amSeattle/Tacoma Intl
17h 35m
2 stops
SOF1:45 pmSofia
Nov 18
SOF6:10 amSofia
22h 12m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$760
Air Canada
Sep 9
SEA8:00 amSeattle/Tacoma Intl
18h 10m
2 stops
SOF12:10 pmSofia
Sep 30
SOF6:20 amSofia
22h 12m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$774

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Nov 4
SEA3:10 pmSeattle/Tacoma Intl
17h 10m
1 stop
SOF6:20 pmSofia
Nov 18
SOF6:10 amSofia
16h 00m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$744
Lufthansa
Nov 4
SEA3:10 pmSeattle/Tacoma Intl
17h 10m
1 stop
SOF6:20 pmSofia
Nov 18
SOF6:10 amSofia
16h 00m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$746
Lufthansa
Sep 9
SEA6:50 pmSeattle/Tacoma Intl
13h 50m
1 stop
SOF6:40 pmSofia
Sep 23
SOF12:55 pmSofia
14h 04m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$755

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 May 18, 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 - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/16

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Wed 9/30

12:55 pm-10:42 pm

2 stops19h 47m

$642

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:15 pm-8:45 am

1 stop27h 30m

Sofia

Tue 9/22

3:50 pm-5:20 pm

1 stop35h 30m

$712

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/9

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Wed 9/30

3:50 pm-5:20 pm

1 stop35h 30m

$735

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Wed 11/18

6:10 am-12:10 pm

1 stop16h 00m

$744

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Wed 11/18

6:10 am-12:10 pm

1 stop16h 00m

$746

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:15 pm-8:45 am

1 stop27h 30m

Sofia

Tue 9/22

3:50 pm-5:20 pm

1 stop35h 30m

$748

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

3:51 pm-10:45 pm

2 stops20h 54m

Sofia

Wed 11/18

6:10 am-12:10 pm

1 stop16h 00m

$752

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

11:00 am-1:15 pm

2 stops16h 15m

Sofia

Wed 11/18

2:00 pm-12:33 am

2 stops20h 33m

$753
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/9

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Wed 9/23

12:55 pm-4:59 pm

1 stop14h 04m

$755

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

10:10 am-1:45 pm

2 stops17h 35m

Sofia

Wed 11/18

6:10 am-6:22 pm

2 stops22h 12m

$760

Flights are sorted by cheapest round-trip flights first.

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

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 $753 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 $644 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

13h 50m

Direct flights

None
The fastest flight from Seattle to Sofia takes 13h 50m
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 13h 50m, 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
1,517 reviews
Search KLM flights
LufthansaPriceFrom $541Free CancellationRating
6.8
8,010 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $572Free CancellationRating
7.4
4,376 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
9,736 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