Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Sofia from $363

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 7/15. 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.
Multiple Airlines Logo
6:50 pm - 6:40 pm
SEA
-
SOF
13h 50m
1 stop
Multiple Airlines Logo
6:10 am - 2:22 pm
SOF
-
SEA
18h 12m
2 stops
$745Multiple Airlines
Wed, Oct 7 - Tue, Oct 20
United Airlines Logo
2:50 pm - 6:20 pm
SEA
-
SOF
17h 30m
1 stop
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$747United Airlines
Sun, Nov 8 - Thu, Nov 19
Multiple Airlines Logo
3:00 pm - 6:40 pm
SEA
-
SOF
17h 40m
2 stops
Multiple Airlines Logo
12:55 pm - 10:42 pm
SOF
-
SEA
19h 47m
2 stops
$748Multiple Airlines
Wed, Oct 7 - Tue, Oct 20
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
$749Turkish Airlines
Thu, Oct 8 - Wed, Oct 21
British Airways Logo
1:25 pm - 8:10 pm
SEA
-
SOF
20h 45m
1 stop
British Airways Logo
5:25 pm - 11:30 am
SOF
-
SEA
28h 05m
1 stop
$750British Airways
Tue, Nov 10 - Mon, Nov 23
United Airlines Logo
10:45 pm - 1:10 pm
SEA
-
SOF
28h 25m
2 stops
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$751United Airlines
Sat, Dec 12 - Thu, Dec 24
United Airlines Logo
5:07 am - 6:20 pm
SEA
-
SOF
27h 13m
2 stops
United Airlines Logo
6:00 am - 1:00 pm
SOF
-
SEA
17h 00m
1 stop
$753United Airlines
Wed, Nov 4 - Fri, Nov 20
United Airlines Logo
2:50 pm - 6:20 pm
SEA
-
SOF
17h 30m
1 stop
United Airlines Logo
6:25 am - 8:54 pm
SOF
-
SEA
24h 29m
2 stops
$755United Airlines
Wed, Nov 4 - Tue, Nov 24
Air Canada Logo
7:45 am - 6:20 pm
SEA
-
SOF
24h 35m
2 stops
Air Canada Logo
6:00 am - 9:57 pm
SOF
-
SEA
25h 57m
2 stops
$757Air Canada
Wed, Dec 9 - Thu, Dec 24
United Airlines Logo
2:00 pm - 11:00 pm
SEA
-
SOF
23h 00m
1 stop
United Airlines Logo
6:25 am - 12:00 pm
SOF
-
SEA
15h 35m
1 stop
$759United Airlines
Sun, Dec 13 - Thu, Dec 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

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Nov 4
SEA2:50 pmSeattle/Tacoma Intl
21h 55m
1 stop
SOF10:45 pmSofia
Nov 24
SOF2:00 pmSofia
33h 00m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$764
Lufthansa
Nov 4
SEA2:50 pmSeattle/Tacoma Intl
17h 30m
1 stop
SOF6:20 pmSofia
Nov 15
SOF6:25 amSofia
15h 35m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$779
Lufthansa
Nov 8
SEA2:50 pmSeattle/Tacoma Intl
17h 30m
1 stop
SOF6:20 pmSofia
Nov 23
SOF6:25 amSofia
15h 35m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$796

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Nov 8
SEA2:50 pmSeattle/Tacoma Intl
17h 30m
1 stop
SOF6:20 pmSofia
Nov 19
SOF6:25 amSofia
15h 35m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$747
United Airlines
Dec 12
SEA10:45 pmSeattle/Tacoma Intl
28h 25m
2 stops
SOF1:10 pmSofia
Dec 24
SOF6:25 amSofia
15h 35m
1 stop
SEA12:00 pmSeattle/Tacoma Intl
$751
United Airlines
Nov 4
SEA5:07 amSeattle/Tacoma Intl
27h 13m
2 stops
SOF6:20 pmSofia
Nov 20
SOF6:00 amSofia
17h 00m
1 stop
SEA1:00 pmSeattle/Tacoma Intl
$753

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 June 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
Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

6:50 pm-6:40 pm

1 stop13h 50m

Sofia

Tue 10/20

6:10 am-2:22 pm

2 stops18h 12m

$745

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 11/8

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Thu 11/19

6:25 am-12:00 pm

1 stop15h 35m

$747

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 10/7

3:00 pm-6:40 pm

2 stops17h 40m

Sofia

Tue 10/20

12:55 pm-10:42 pm

2 stops19h 47m

$748

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 10/8

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Wed 10/21

9:10 pm-5:20 pm

1 stop30h 10m

$749

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 11/10

1:25 pm-8:10 pm

1 stop20h 45m

Sofia

Mon 11/23

5:25 pm-11:30 am

1 stop28h 05m

$750

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 12/12

10:45 pm-1:10 pm

2 stops28h 25m

Sofia

Thu 12/24

6:25 am-12:00 pm

1 stop15h 35m

$751

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

5:07 am-6:20 pm

2 stops27h 13m

Sofia

Fri 11/20

6:00 am-1:00 pm

1 stop17h 00m

$753

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/4

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Tue 11/24

6:25 am-8:54 pm

2 stops24h 29m

$755

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 12/9

7:45 am-6:20 pm

2 stops24h 35m

Sofia

Thu 12/24

6:00 am-9:57 pm

2 stops25h 57m

$757

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 12/13

2:00 pm-11:00 pm

1 stop23h 00m

Sofia

Thu 12/24

6:25 am-12:00 pm

1 stop15h 35m

$759

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 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 $756 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

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
1,530 reviews
Search KLM flights
LufthansaPriceFrom $541Free CancellationRating
6.8
8,068 reviews
Search Lufthansa flights
Turkish AirlinesPriceFrom $572Free CancellationRating
7.4
4,410 reviews
Search Turkish Airlines flights
United AirlinesPriceFrom $620Free CancellationRating
7.4
9,851 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
Sat 7/18
Sat 7/25
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