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Cheap flights from Seattle to Sofia from $306

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 5/26. 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.
United Airlines Logo
3:51 pm - 11:00 pm
SEA
-
SOF
21h 09m
2 stops
United Airlines Logo
6:20 am - 10:22 pm
SOF
-
SEA
26h 02m
2 stops
$551United Airlines
Mon, Aug 24 - Wed, Oct 7
United Airlines Logo
3:51 pm - 11:00 pm
SEA
-
SOF
21h 09m
2 stops
United Airlines Logo
12:55 pm - 4:59 pm
SOF
-
SEA
14h 04m
1 stop
$552United Airlines
Mon, Aug 24 - Wed, Oct 7
United Airlines Logo
8:00 am - 12:10 pm
SEA
-
SOF
18h 10m
2 stops
United Airlines Logo
6:20 am - 2:22 pm
SOF
-
SEA
18h 02m
2 stops
$555United Airlines
Sun, Aug 23 - Fri, Oct 2
United Airlines Logo
3:51 pm - 11:00 pm
SEA
-
SOF
21h 09m
2 stops
United Airlines Logo
6:10 am - 9:04 pm
SOF
-
SEA
24h 54m
2 stops
$560United Airlines
Mon, Aug 24 - Thu, Oct 8
United Airlines Logo
11:11 am - 11:00 pm
SEA
-
SOF
25h 49m
2 stops
United Airlines Logo
6:20 am - 8:50 pm
SOF
-
SEA
24h 30m
2 stops
$561United Airlines
Mon, Aug 24 - Wed, Oct 7
United Airlines Logo
5:15 am - 6:10 pm
SEA
-
SOF
26h 55m
2 stops
United Airlines Logo
6:20 am - 12:20 pm
SOF
-
SEA
16h 00m
1 stop
$563United Airlines
Sun, Aug 23 - Fri, Oct 2
United Airlines Logo
5:15 am - 6:10 pm
SEA
-
SOF
26h 55m
2 stops
United Airlines Logo
12:55 pm - 4:59 pm
SOF
-
SEA
14h 04m
1 stop
$564United Airlines
Sun, Aug 23 - Wed, Oct 7
United Airlines Logo
3:51 pm - 11:00 pm
SEA
-
SOF
21h 09m
2 stops
United Airlines Logo
12:55 pm - 9:04 pm
SOF
-
SEA
42h 09m
2 stops
$570United Airlines
Mon, Aug 24 - Mon, Oct 5
United Airlines Logo
3:51 pm - 11:00 pm
SEA
-
SOF
21h 09m
2 stops
United Airlines Logo
2:20 pm - 12:20 pm
SOF
-
SEA
32h 00m
1 stop
$571United Airlines
Mon, Aug 24 - Mon, Oct 5
United Airlines Logo
11:11 am - 11:00 pm
SEA
-
SOF
25h 49m
2 stops
United Airlines Logo
2:20 pm - 12:20 pm
SOF
-
SEA
32h 00m
1 stop
$572United Airlines
Mon, Aug 24 - Mon, Oct 5

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Aug 24
SEA3:51 pmSeattle/Tacoma Intl
21h 09m
2 stops
SOF11:00 pmSofia
Oct 7
SOF6:20 amSofia
26h 02m
2 stops
SEA10:22 pmSeattle/Tacoma Intl
$551
United Airlines
Aug 24
SEA3:51 pmSeattle/Tacoma Intl
21h 09m
2 stops
SOF11:00 pmSofia
Oct 7
SOF12:55 pmSofia
14h 04m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$552
United Airlines
Aug 23
SEA8:00 amSeattle/Tacoma Intl
18h 10m
2 stops
SOF12:10 pmSofia
Oct 2
SOF6:20 amSofia
18h 02m
2 stops
SEA2:22 pmSeattle/Tacoma Intl
$555

KLM flights from Seattle to Sofia

Our best KLM deals on Seattle to Sofia flight tickets
KLM
Aug 24
SEA1:50 pmSeattle/Tacoma Intl
14h 10m
1 stop
SOF2:00 pmSofia
Oct 6
SOF7:00 amSofia
19h 39m
1 stop
SEA4:39 pmSeattle/Tacoma Intl
$578
KLM
Apr 14
SEA1:45 pmSeattle/Tacoma Intl
14h 15m
1 stop
SOF2:00 pmSofia
Apr 21
SOF7:00 amSofia
14h 45m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$591
KLM
Apr 14
SEA7:20 amSeattle/Tacoma Intl
20h 40m
2 stops
SOF2:00 pmSofia
Apr 21
SOF7:00 amSofia
14h 45m
1 stop
SEA11:45 amSeattle/Tacoma Intl
$595

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 28, 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

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Wed 10/7

6:20 am-10:22 pm

2 stops26h 02m

$551

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Wed 10/7

12:55 pm-4:59 pm

1 stop14h 04m

$552

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 8/23

8:00 am-12:10 pm

2 stops18h 10m

Sofia

Fri 10/2

6:20 am-2:22 pm

2 stops18h 02m

$555

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Thu 10/8

6:10 am-9:04 pm

2 stops24h 54m

$560

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

11:11 am-11:00 pm

2 stops25h 49m

Sofia

Wed 10/7

6:20 am-8:50 pm

2 stops24h 30m

$561

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 8/23

5:15 am-6:10 pm

2 stops26h 55m

Sofia

Fri 10/2

6:20 am-12:20 pm

1 stop16h 00m

$563

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 8/23

5:15 am-6:10 pm

2 stops26h 55m

Sofia

Wed 10/7

12:55 pm-4:59 pm

1 stop14h 04m

$564

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Mon 10/5

12:55 pm-9:04 pm

2 stops42h 09m

$570

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

3:51 pm-11:00 pm

2 stops21h 09m

Sofia

Mon 10/5

2:20 pm-12:20 pm

1 stop32h 00m

$571

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/24

11:11 am-11:00 pm

2 stops25h 49m

Sofia

Mon 10/5

2:20 pm-12:20 pm

1 stop32h 00m

$572

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?

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 $765 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 $617 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

  • 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
LufthansaPriceFrom $540Free CancellationRating
6.8
7,818 reviews
Search Lufthansa flights
KLMPriceFrom $552Free CancellationRating
7.7
1,461 reviews
Search KLM flights
Air FrancePriceFrom $555Free CancellationRating
7.4
1,541 reviews
Search Air France flights
Turkish AirlinesPriceFrom $587Free CancellationRating
7.3
4,237 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
9,365 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