HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Sofia

$347+ Cheap flights from Seattle (SEA) to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Sofia with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sofia are usually found in April or February, booked 64 days in advance, depart on a Saturday or Monday and return on a Sunday

Cheap flight deals from Seattle to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 17, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$656
(Air France)

One-way from

$347
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$748
Provider with most accurate pricing for Seattle/Tacoma Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sofia flights.
Search Deals
From Seattle/Tacoma Intl to Sofia
Search Deals
One-way flight from Seattle/Tacoma Intl to Sofia
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($9 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2025
Search Deals

Find flight deals from Seattle to Sofia

Cheapest flights from Seattle to Sofia
Explore the most affordable flight options available from Seattle to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2025.

This Air France deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/268:30 amSEA - SOF
2 stops19h 30mMultiple Airlines
Tue 9/167:00 amSOF - SEA
1 stop14h 45mMultiple Airlines
Deal found 4/16$656
This KLM deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/255:40 pmSEA - SOF
1 stop34h 20mKLM
Tue 9/167:00 amSOF - SEA
1 stop14h 45mKLM
Deal found 4/16$657
This Expedia deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/263:19 pmSEA - SOF
2 stops32h 46mSWISS
Tue 9/161:15 pmSOF - SEA
2 stops41h 39mSWISS
Deal found 4/16$663
This United Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:50 pmSEA - SOF
1 stop18h 10mUnited Airlines
Wed 5/216:15 amSOF - SEA
2 stops23h 22mUnited Airlines
Deal found 4/16$724
This Air Canada deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/710:00 amSEA - SOF
2 stops21h 50mAir Canada
Tue 5/206:20 amSOF - SEA
2 stops23h 17mAir Canada
Deal found 4/16$727
This Lufthansa deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:50 pmSEA - SOF
1 stop18h 10mLufthansa
Fri 5/236:00 amSOF - SEA
1 stop20h 59mLufthansa
Deal found 4/16$735
This FlightHub deal was found by Cheapflights users on 4/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/2112:30 pmSEA - SOF
1 stop16h 15mTurkish Airlines
Sun 9/219:25 amSOF - SEA
1 stop17h 50mTurkish Airlines
Deal found 4/17$826
This Austrian Airlines deal was found by Cheapflights users on 4/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/68:10 amSEA - SOF
2 stops24h 00mAustrian Airlines
Fri 5/236:55 pmSOF - SEA
2 stops35h 46mAustrian Airlines
Deal found 4/16$1,068

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
Use the filters below to find and compare flights from Seattle to Sofia that are best for you.

Fly from

Seattle

Fly to

Sofia

Route

Depart

Return

Price

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/26

8:30 am-2:00 pm

2 stops19h 30m

Sofia

Tue 9/16

7:00 am-11:45 am

1 stop14h 45m

$656

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/25

5:40 pm-2:00 pm

1 stop34h 20m

Sofia

Tue 9/16

7:00 am-11:45 am

1 stop14h 45m

$657

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 8/26

3:19 pm-10:05 am

2 stops32h 46m

Sofia

Tue 9/16

1:15 pm-8:54 pm

2 stops41h 39m

$663

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 5/7

6:50 pm-11:00 pm

1 stop18h 10m

Sofia

Wed 5/21

6:15 am-7:37 pm

2 stops23h 22m

$724

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 5/7

10:00 am-5:50 pm

2 stops21h 50m

Sofia

Tue 5/20

6:20 am-7:37 pm

2 stops23h 17m

$727

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 5/7

6:50 pm-11:00 pm

1 stop18h 10m

Sofia

Fri 5/23

6:00 am-4:59 pm

1 stop20h 59m

$735

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 8/21

12:30 pm-2:45 pm

1 stop16h 15m

Sofia

Sun 9/21

9:25 am-5:15 pm

1 stop17h 50m

$826

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 5/6

8:20 pm-8:40 pm

1 stop14h 20m

Sofia

Mon 5/19

8:00 pm-11:10 am

1 stop25h 10m

$1,002

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 5/6

8:10 am-6:10 pm

2 stops24h 00m

Sofia

Fri 5/23

6:55 pm-8:41 pm

2 stops35h 46m

$1,068

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 8/13

11:30 pm-4:05 pm

2 stops30h 35m

$347

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 15 results
1
2

Compare providers for flights from Seattle to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Sofia in April.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
ExpediaPrice Accuracy1 starTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Sofia flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Seattle-Sofia flight deals on Cheapflights vs. AranGrant >95% of the time. Price accuracy is based on data collected from Seattle-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Sofia flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Sofia

How far ahead should I book a flight from Seattle to Sofia?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Sofia. Price data was last updated on April 11, 2025.

The price you pay for your flight from Seattle to Sofia may vary depending on when you book. For the best chance of a lower fare, look to book 64 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Seattle to Sofia?

Currently, November is the cheapest month in which you can book a flight from Seattle to Sofia (average of $632). Flying from Seattle to Sofia in June is currently the most expensive (average of $1,243). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from SEA to SOF?

Find hourly flight availability from Seattle to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 17, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 19% on flights from Seattle to Sofia by exploring options for tickets in the evening.

What is the cheapest day to fly from Seattle to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Sofia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Sofia flight should consider departing on Saturday evenings when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Sofia by month

Plan your trip to Sofia by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Sofia ranges from 1.2 - 2.8 inches per month. June is typically the wettest month, when rainfall can reach 2.8 in. January is typically the driest time to visit Sofia when rainfall is around 1.2 in.

Temperature in Sofia by month

Plan your trip to Sofia by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Sofia, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated April 17, 2025.
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,327 reviews
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Austrian Airlines
7.6
Good
775 reviews
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
SWISS
7.5
Good
1,580 reviews
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,667 reviews
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Turkish Airlines
7.3
Good
3,769 reviews
KLM
7.8
Good
1,327 reviews

Overall

7.8

Food

7.3

Boarding

7.8

Entertainment

7.1

Comfort

7.7

Crew

8.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What are the cheapest airlines flying from Seattle to Sofia round-trip?

    Cheapflights users have booked flights from Seattle to Sofia round-trip from $657. Other airlines that can offer you cheap pricing are SWISS, from $663, and United Airlines, from $724. KLM is 33% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Sofia one-way?

    One-way options have recently been found by users for as low as $549 on British Airways. Other airlines that offer cheap prices include Lufthansa from $573 and United Airlines from $580 one-way.

  • Can I find deals for flights from Seattle to Sofia that include hotel bookings?

    Yes. In addition to deals on Seattle to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Sofia.

  • Can I find deals for business class flights from Seattle to Sofia?

    Yes. Cheapflights offers flight deals from Seattle to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Sofia?

    Currently, November is the cheapest month in which you can book a flight from Seattle to Sofia (average of $632). Flying from Seattle to Sofia in June is currently the most expensive (average of $1,243). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Spokane to Sofia flights
Portland to Sofia flights

Top 5 airlines flying from Seattle to Sofia

Discover the top 5 airlines that operate flights from Seattle to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$584Average$1,130FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$684Average$1,204FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$700Average$1,024FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$711Average$1,174FlexibilityNo cancel feeOn-time76%
KLMCheapest$719Average$1,023FlexibilityNo cancel feeOn-time75%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.