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Cheap flights from Seattle to Sofia from $321

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 3/31. 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
2:10 pm - 6:20 pm
SEA
-
SOF
18h 10m2 stops
Lufthansa Logo
6:05 am - 1:20 pm
SOF
-
SEA
17h 15m1 stop
$475Lufthansa
Wed, Jan 28 - Wed, Feb 4
Lufthansa Logo
3:10 pm - 6:20 pm
SEA
-
SOF
17h 10m1 stop
Lufthansa Logo
6:05 am - 1:20 pm
SOF
-
SEA
17h 15m1 stop
$488Lufthansa
Wed, Jan 28 - Wed, Feb 4
Multiple Airlines Logo
2:00 pm - 10:45 pm
SEA
-
SOF
22h 45m1 stop
Multiple Airlines Logo
6:00 am - 7:16 pm
SOF
-
SEA
23h 16m2 stops
$520Multiple Airlines
Thu, Jan 29 - Thu, Feb 5
Multiple Airlines Logo
2:00 pm - 1:40 pm
SEA
-
SOF
13h 40m1 stop
Multiple Airlines Logo
6:25 am - 10:06 pm
SOF
-
SEA
25h 41m2 stops
$521Multiple Airlines
Sat, Jan 31 - Sat, Feb 7
Lufthansa Logo
8:00 am - 12:05 pm
SEA
-
SOF
18h 05m2 stops
Lufthansa Logo
6:20 am - 12:20 pm
SOF
-
SEA
16h 00m1 stop
$522Lufthansa
Wed, Apr 1 - Wed, Apr 8
Lufthansa Logo
2:10 pm - 6:20 pm
SEA
-
SOF
18h 10m2 stops
Lufthansa Logo
6:00 am - 12:10 pm
SOF
-
SEA
16h 10m1 stop
$526Lufthansa
Tue, Jan 27 - Thu, Feb 5
Lufthansa Logo
3:10 pm - 6:20 pm
SEA
-
SOF
17h 10m1 stop
Lufthansa Logo
6:00 am - 12:10 pm
SOF
-
SEA
16h 10m1 stop
$527Lufthansa
Wed, Jan 28 - Thu, Feb 5
Lufthansa Logo
2:10 pm - 6:20 pm
SEA
-
SOF
18h 10m2 stops
Lufthansa Logo
6:05 am - 1:20 pm
SOF
-
SEA
17h 15m1 stop
$528Lufthansa
Tue, Jan 27 - Wed, Feb 4
Lufthansa Logo
2:10 pm - 10:45 pm
SEA
-
SOF
22h 35m2 stops
Lufthansa Logo
6:10 am - 8:57 pm
SOF
-
SEA
24h 47m2 stops
$529Lufthansa
Wed, Jan 28 - Wed, Feb 4
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
Tue, Jan 27 - Wed, Feb 4

Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets
Lufthansa
Apr 1
SEA8:00 amSeattle/Tacoma Intl
18h 05m
2 stops
SOF12:05 pmSofia
Apr 8
SOF6:20 amSofia
16h 00m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$522
Find similar
Lufthansa
Apr 1
SEA6:50 pmSeattle/Tacoma Intl
18h 20m
1 stop
SOF11:10 pmSofia
Apr 8
SOF6:20 amSofia
16h 00m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$527
Find similar
Lufthansa
Apr 1
SEA2:16 pmSeattle/Tacoma Intl
22h 54m
2 stops
SOF11:10 pmSofia
Apr 8
SOF6:20 amSofia
22h 40m
2 stops
SEA7:00 pmSeattle/Tacoma Intl
$529
Find similar

United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets
United Airlines
Jan 29
SEA8:40 amSeattle/Tacoma Intl
28h 05m
3 stops
SOF10:45 pmSofia
Feb 2
SOF6:10 amSofia
16h 00m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$535
Find similar
United Airlines
Jan 29
SEA8:40 amSeattle/Tacoma Intl
28h 05m
3 stops
SOF10:45 pmSofia
Feb 2
SOF6:10 amSofia
16h 00m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$536
Find similar
United Airlines
Jan 31
SEA5:00 amSeattle/Tacoma Intl
31h 45m
2 stops
SOF10:45 pmSofia
Feb 7
SOF6:05 amSofia
26h 11m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$544
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 18, 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

Wed 1/28

2:10 pm-6:20 pm

2 stops18h 10m

Sofia

Wed 2/4

6:05 am-1:20 pm

1 stop17h 15m

$475

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 1/28

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Wed 2/4

6:05 am-1:20 pm

1 stop17h 15m

$488

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 1/29

2:00 pm-10:45 pm

1 stop22h 45m

Sofia

Thu 2/5

6:00 am-7:16 pm

2 stops23h 16m

$520

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 1/31

2:00 pm-1:40 pm

1 stop13h 40m

Sofia

Sat 2/7

6:25 am-10:06 pm

2 stops25h 41m

$521

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

8:00 am-12:05 pm

2 stops18h 05m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$522

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 1/27

2:10 pm-6:20 pm

2 stops18h 10m

Sofia

Thu 2/5

6:00 am-12:10 pm

1 stop16h 10m

$526

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 1/28

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Thu 2/5

6:00 am-12:10 pm

1 stop16h 10m

$527

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 1/27

2:10 pm-6:20 pm

2 stops18h 10m

Sofia

Wed 2/4

6:05 am-1:20 pm

1 stop17h 15m

$528

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 1/28

2:10 pm-10:45 pm

2 stops22h 35m

Sofia

Wed 2/4

6:10 am-8:57 pm

2 stops24h 47m

$529

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 1/27

1:40 pm-1:55 pm

1 stop14h 15m

Sofia

Wed 2/4

7:00 am-11:40 am

1 stop14h 40m

$530

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 $784 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

13h 40m

Direct flights

None
The fastest flight from Seattle to Sofia takes 13h 40m
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 40m, 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
7,635 reviews
Search Lufthansa flights
Air FrancePriceFrom $555Free CancellationRating
7.4
1,507 reviews
Search Air France flights
Turkish AirlinesPriceFrom $587Free CancellationRating
7.3
4,102 reviews
Search Turkish Airlines flights
KLMPriceFrom $615Free CancellationRating
7.7
1,428 reviews
Search KLM flights
United AirlinesPriceFrom $621Free CancellationRating
7.4
9,093 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