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Cheap flights from Seattle to Sofia from $287

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 9/7. 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.
Lufthansa Logo
2:50 pm - 6:20 pm
SEA
-
SOF
17h 30m
1 stop
Lufthansa Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$740Lufthansa
Wed, Nov 4 - Wed, Nov 18
Lufthansa Logo
2:50 pm - 6:20 pm
SEA
-
SOF
17h 30m
1 stop
Lufthansa Logo
6:25 am - 6:22 pm
SOF
-
SEA
21h 57m
2 stops
$744Lufthansa
Wed, Nov 4 - Wed, Nov 18
Multiple Airlines Logo
7:45 am - 6:20 pm
SEA
-
SOF
24h 35m
2 stops
Multiple Airlines Logo
6:25 am - 9:17 am
SOF
-
SEA
36h 52m
2 stops
$755Multiple Airlines
Wed, Nov 4 - Wed, Nov 18
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
6:10 am - 11:55 am
SOF
-
SEA
15h 45m
1 stop
$759Lufthansa
Sun, Sep 6 - Tue, Sep 22
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
12:55 pm - 4:59 pm
SOF
-
SEA
14h 04m
1 stop
$760Lufthansa
Sun, Sep 6 - Tue, Sep 22
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
6:10 am - 4:59 pm
SOF
-
SEA
20h 49m
1 stop
$763Lufthansa
Sun, Sep 6 - Tue, Sep 22
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
12:55 pm - 10:42 pm
SOF
-
SEA
19h 47m
2 stops
$764Lufthansa
Sun, Sep 6 - Tue, Sep 22
Multiple Airlines Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Multiple Airlines Logo
12:55 pm - 10:42 pm
SOF
-
SEA
19h 47m
2 stops
$766Multiple Airlines
Sun, Sep 6 - Tue, Sep 22
United Airlines Logo
11:59 pm - 11:15 pm
SEA
-
SOF
37h 16m
2 stops
United Airlines Logo
6:30 am - 11:55 am
SOF
-
SEA
15h 25m
1 stop
$770United Airlines
Mon, Aug 31 - Thu, Sep 10
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
6:30 am - 11:55 am
SOF
-
SEA
15h 25m
1 stop
$776Lufthansa
Sun, Aug 30 - Thu, Sep 10

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Aug 31
SEA11:59 pmSeattle/Tacoma Intl
37h 16m
2 stops
SOF11:15 pmSofia
Sep 10
SOF6:30 amSofia
15h 25m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$770
United Airlines
Sep 6
SEA9:00 amSeattle/Tacoma Intl
28h 15m
2 stops
SOF11:15 pmSofia
Sep 22
SOF6:10 amSofia
25h 21m
2 stops
SEA9:31 pmSeattle/Tacoma Intl
$781
United Airlines
Aug 30
SEA2:34 pmSeattle/Tacoma Intl
22h 41m
2 stops
SOF11:15 pmSofia
Sep 10
SOF6:30 amSofia
15h 25m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$787

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Nov 4
SEA2:50 pmSeattle/Tacoma Intl
17h 30m
1 stop
SOF6:20 pmSofia
Nov 18
SOF6:25 amSofia
15h 35m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$740
Lufthansa
Nov 4
SEA2:50 pmSeattle/Tacoma Intl
17h 30m
1 stop
SOF6:20 pmSofia
Nov 18
SOF6:25 amSofia
21h 57m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$744
Lufthansa
Sep 6
SEA6:50 pmSeattle/Tacoma Intl
18h 25m
1 stop
SOF11:15 pmSofia
Sep 22
SOF6:10 amSofia
15h 45m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$759

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 30, 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 11/4

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Wed 11/18

6:25 am-12:00 pm

1 stop15h 35m

$740

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Wed 11/18

6:25 am-6:22 pm

2 stops21h 57m

$744

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

7:45 am-6:20 pm

2 stops24h 35m

Sofia

Wed 11/18

6:25 am-9:17 am

2 stops36h 52m

$755

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Tue 9/22

6:10 am-11:55 am

1 stop15h 45m

$759
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Tue 9/22

12:55 pm-4:59 pm

1 stop14h 04m

$760

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Tue 9/22

6:10 am-4:59 pm

1 stop20h 49m

$763

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Tue 9/22

12:55 pm-10:42 pm

2 stops19h 47m

$764

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Tue 9/22

12:55 pm-10:42 pm

2 stops19h 47m

$766

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/31

11:59 pm-11:15 pm

2 stops37h 16m

Sofia

Thu 9/10

6:30 am-11:55 am

1 stop15h 25m

$770

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 8/30

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Thu 9/10

6:30 am-11:55 am

1 stop15h 25m

$776

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 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
1,524 reviews
Search KLM flights
LufthansaPriceFrom $540Free CancellationRating
6.8
8,032 reviews
Search Lufthansa flights
United AirlinesPriceFrom $545Free CancellationRating
7.4
9,768 reviews
Search United Airlines flights
Turkish AirlinesPriceFrom $572Free CancellationRating
7.4
4,404 reviews
Search Turkish 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