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Cheap flights from Seattle to Sofia from $234

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 4/26. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
British Airways Logo
1:35 pm - 7:10 pm
SEA
-
SOF
19h 35m1 stop
British Airways Logo
8:00 pm - 6:25 pm
SOF
-
SEA
32h 25m1 stop
$504British Airways
Sun, Apr 12 - Mon, Apr 20
Multiple Airlines Logo
3:10 pm - 10:45 pm
SEA
-
SOF
21h 35m1 stop
Multiple Airlines Logo
6:10 am - 10:16 pm
SOF
-
SEA
26h 06m2 stops
$514Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
British Airways Logo
8:20 pm - 8:40 pm
SEA
-
SOF
14h 20m1 stop
British Airways Logo
8:00 pm - 11:35 am
SOF
-
SEA
25h 35m1 stop
$519British Airways
Tue, Apr 28 - Mon, May 11
Multiple Airlines Logo
2:40 pm - 1:55 pm
SEA
-
SOF
14h 15m1 stop
Multiple Airlines Logo
7:00 am - 11:45 am
SOF
-
SEA
14h 45m1 stop
$524Multiple Airlines
Tue, Mar 24 - Tue, Apr 28
Multiple Airlines Logo
2:40 pm - 1:55 pm
SEA
-
SOF
14h 15m1 stop
Multiple Airlines Logo
7:00 am - 11:45 am
SOF
-
SEA
14h 45m1 stop
$525Multiple Airlines
Tue, Mar 24 - Tue, Apr 28
Multiple Airlines Logo
2:00 pm - 10:45 pm
SEA
-
SOF
22h 45m1 stop
Multiple Airlines Logo
6:00 am - 10:16 pm
SOF
-
SEA
26h 16m2 stops
$528Multiple Airlines
Thu, Feb 5 - Thu, Feb 12
Multiple Airlines Logo
9:52 am - 1:55 pm
SEA
-
SOF
19h 03m2 stops
Multiple Airlines Logo
7:00 am - 8:00 pm
SOF
-
SEA
23h 00m2 stops
$529Multiple Airlines
Tue, Mar 24 - Tue, Apr 28
Multiple Airlines Logo
1:40 pm - 1:55 pm
SEA
-
SOF
14h 15m1 stop
Multiple Airlines Logo
7:00 am - 11:40 am
SOF
-
SEA
14h 40m1 stop
$530Multiple Airlines
Thu, Feb 5 - Thu, Feb 12
United Airlines Logo
6:50 pm - 11:10 pm
SEA
-
SOF
18h 20m1 stop
United Airlines Logo
6:10 am - 12:20 pm
SOF
-
SEA
16h 10m1 stop
$531United Airlines
Wed, Apr 29 - Tue, May 12
KLM Logo
5:30 pm - 2:00 pm
SEA
-
SOF
34h 30m1 stop
KLM Logo
7:00 am - 4:30 pm
SOF
-
SEA
19h 30m1 stop
$532KLM
Wed, Apr 1 - Wed, Apr 8

British Airways flights from Seattle to Sofia

Our best British Airways deals on Seattle to Sofia flight tickets
British Airways
Apr 12
SEA1:35 pmSeattle/Tacoma Intl
19h 35m
1 stop
SOF7:10 pmSofia
Apr 20
SOF8:00 pmSofia
32h 25m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$504
Find similar
British Airways
Apr 28
SEA8:20 pmSeattle/Tacoma Intl
14h 20m
1 stop
SOF8:40 pmSofia
May 11
SOF8:00 pmSofia
25h 35m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$519
Find similar
British Airways
Apr 28
SEA8:20 pmSeattle/Tacoma Intl
14h 20m
1 stop
SOF8:40 pmSofia
May 13
SOF9:30 pmSofia
24h 05m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$536
Find similar

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Apr 29
SEA6:50 pmSeattle/Tacoma Intl
18h 20m
1 stop
SOF11:10 pmSofia
May 12
SOF6:10 amSofia
16h 10m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$531
Find similar
United Airlines
Feb 4
SEA3:10 pmSeattle/Tacoma Intl
21h 35m
1 stop
SOF10:45 pmSofia
Feb 11
SOF6:05 amSofia
17h 15m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$533
Find similar
United Airlines
Apr 29
SEA6:50 pmSeattle/Tacoma Intl
18h 20m
1 stop
SOF11:10 pmSofia
May 13
SOF6:20 amSofia
23h 17m
2 stops
SEA7:37 pmSeattle/Tacoma Intl
$534
Find similar

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 December 23, 2025.
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

Sun 4/12

1:35 pm-7:10 pm

1 stop19h 35m

Sofia

Mon 4/20

8:00 pm-6:25 pm

1 stop32h 25m

$504

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 2/4

3:10 pm-10:45 pm

1 stop21h 35m

Sofia

Wed 2/11

6:10 am-10:16 pm

2 stops26h 06m

$514

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 4/28

8:20 pm-8:40 pm

1 stop14h 20m

Sofia

Mon 5/11

8:00 pm-11:35 am

1 stop25h 35m

$519

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

2:40 pm-1:55 pm

1 stop14h 15m

Sofia

Tue 4/28

7:00 am-11:45 am

1 stop14h 45m

$524

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

2:40 pm-1:55 pm

1 stop14h 15m

Sofia

Tue 4/28

7:00 am-11:45 am

1 stop14h 45m

$525

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 2/5

2:00 pm-10:45 pm

1 stop22h 45m

Sofia

Thu 2/12

6:00 am-10:16 pm

2 stops26h 16m

$528

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

9:52 am-1:55 pm

2 stops19h 03m

Sofia

Tue 4/28

7:00 am-8:00 pm

2 stops23h 00m

$529

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 2/5

1:40 pm-1:55 pm

1 stop14h 15m

Sofia

Thu 2/12

7:00 am-11:40 am

1 stop14h 40m

$530

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/29

6:50 pm-11:10 pm

1 stop18h 20m

Sofia

Tue 5/12

6:10 am-12:20 pm

1 stop16h 10m

$531

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

5:30 pm-2:00 pm

1 stop34h 30m

Sofia

Wed 4/8

7:00 am-4:30 pm

1 stop19h 30m

$532

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 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.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Saturday is the cheapest day to fly to Sofia from Seattle. The lowest ticket price found for a Saturday departure recently was $897. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Seattle to Sofia on a Friday will generally be more expensive and average around $1,269. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

In the evening is the cheapest time of day to fly from Seattle to Sofia when you can find flight prices for as low as $897. Flying to Sofia in the evening is an ideal time because this is during off-peak travel hours. At noon is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,099 per ticket.

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 $785 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 $701 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

14h 15m

Direct flights

None
The fastest flight from Seattle to Sofia takes 14h 15m
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 14h 15m, 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 $541Free CancellationRating
6.8
7,649 reviews
Search Lufthansa flights
Air FrancePriceFrom $555Free CancellationRating
7.4
1,513 reviews
Search Air France flights
Turkish AirlinesPriceFrom $587Free CancellationRating
7.3
4,112 reviews
Search Turkish Airlines flights
KLMPriceFrom $615Free CancellationRating
7.7
1,434 reviews
Search KLM flights
United AirlinesPriceFrom $621Free CancellationRating
7.4
9,107 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