Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Sofia from $409

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 9/15. 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 - 8:20 pm
SEA
-
SOF
15h 05m
1 stop
Turkish Airlines Logo
9:35 am - 5:20 pm
SOF
-
SEA
17h 45m
1 stop
$748Turkish Airlines
Tue, Aug 18 - Thu, Sep 24
Turkish Airlines Logo
12:35 pm - 3:00 pm
SEA
-
SOF
16h 25m
1 stop
Turkish Airlines Logo
3:50 pm - 5:20 pm
SOF
-
SEA
35h 30m
1 stop
$752Turkish Airlines
Mon, Jul 27 - Fri, Oct 2
Turkish Airlines Logo
7:15 pm - 8:45 am
SEA
-
SOF
27h 30m
1 stop
Turkish Airlines Logo
3:50 pm - 10:40 am
SOF
-
SEA
28h 50m
1 stop
$766Turkish Airlines
Thu, Aug 27 - Fri, Sep 11
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
$767Turkish Airlines
Sun, Sep 6 - Tue, Sep 22
Turkish Airlines Logo
7:15 pm - 8:20 pm
SEA
-
SOF
15h 05m
1 stop
Turkish Airlines Logo
9:35 am - 5:20 pm
SOF
-
SEA
17h 45m
1 stop
$788Turkish Airlines
Sat, Aug 29 - Thu, Sep 24
Turkish Airlines Logo
7:15 pm - 3:00 pm
SEA
-
SOF
33h 45m
1 stop
Turkish Airlines Logo
9:10 pm - 5:20 pm
SOF
-
SEA
30h 10m
1 stop
$789Turkish Airlines
Fri, Oct 2 - Tue, Oct 20
Multiple Airlines Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Multiple Airlines Logo
6:30 am - 10:42 pm
SOF
-
SEA
26h 12m
2 stops
$804Multiple Airlines
Tue, Aug 18 - Thu, Sep 24
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
$805Lufthansa
Sun, Aug 16 - Wed, Sep 2
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
$806Lufthansa
Tue, Aug 18 - Wed, Sep 9
Lufthansa Logo
6:50 pm - 11:15 pm
SEA
-
SOF
18h 25m
1 stop
Lufthansa Logo
6:30 am - 6:32 pm
SOF
-
SEA
22h 02m
2 stops
$807Lufthansa
Tue, Aug 18 - Thu, Sep 24

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Aug 18
SEA3:54 pmSeattle/Tacoma Intl
21h 21m
2 stops
SOF11:15 pmSofia
Sep 24
SOF6:30 amSofia
22h 02m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$828
United Airlines
Aug 2
SEA8:57 amSeattle/Tacoma Intl
28h 18m
2 stops
SOF11:15 pmSofia
Aug 18
SOF6:10 amSofia
20h 49m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$829
United Airlines
Aug 2
SEA2:34 pmSeattle/Tacoma Intl
22h 41m
2 stops
SOF11:15 pmSofia
Aug 18
SOF12:55 pmSofia
42h 41m
2 stops
SEA9:36 pmSeattle/Tacoma Intl
$832

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Sep 8
SEA6:50 pmSeattle/Tacoma Intl
13h 50m
1 stop
SOF6:40 pmSofia
Sep 25
SOF6:20 amSofia
15h 35m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$804
Lufthansa
Aug 16
SEA6:50 pmSeattle/Tacoma Intl
13h 50m
1 stop
SOF6:40 pmSofia
Sep 2
SOF12:55 pmSofia
14h 04m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$805
Lufthansa
Aug 18
SEA6:50 pmSeattle/Tacoma Intl
18h 25m
1 stop
SOF11:15 pmSofia
Sep 24
SOF6:30 amSofia
22h 02m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$807

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 July 4, 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

Tue 8/18

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Thu 9/24

9:35 am-5:20 pm

1 stop17h 45m

$748

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 7/27

12:35 pm-3:00 pm

1 stop16h 25m

Sofia

Fri 10/2

3:50 pm-5:20 pm

1 stop35h 30m

$752

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 8/27

7:15 pm-8:45 am

1 stop27h 30m

Sofia

Fri 9/11

3:50 pm-10:40 am

1 stop28h 50m

$766

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 9/22

3:50 pm-5:20 pm

1 stop35h 30m

$767

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 8/29

7:15 pm-8:20 pm

1 stop15h 05m

Sofia

Thu 9/24

9:35 am-5:20 pm

1 stop17h 45m

$788

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 10/2

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 10/20

9:10 pm-5:20 pm

1 stop30h 10m

$789

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/18

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Thu 9/24

6:30 am-10:42 pm

2 stops26h 12m

$804
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 8/16

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Wed 9/2

12:55 pm-4:59 pm

1 stop14h 04m

$805

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/18

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Wed 9/9

12:55 pm-4:59 pm

1 stop14h 04m

$806

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/18

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Thu 9/24

6:30 am-6:32 pm

2 stops22h 02m

$807

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 $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

18h 25m

Direct flights

None
The fastest flight from Seattle to Sofia takes 18h 25m
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 18h 25m, 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
1,533 reviews
Search KLM flights
LufthansaPriceFrom $540Free CancellationRating
6.8
8,111 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $571Free CancellationRating
7.4
4,437 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
9,930 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.

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Mon 8/3
Mon 8/10
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Bulgaria

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