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$369+ 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 7/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Sofia are usually found in April or February, booked 44 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 June 12, 2025.

Round-trip from

$613
(United Airlines)

One-way from

$369
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,091
From Seattle/Tacoma Intl to Sofia
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One-way flight from Seattle/Tacoma Intl to Sofia
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Highest demand for flights based on searches. 4% potential increase in price ($48 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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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 June 12, 2025.

This FlightHub deal was found by Cheapflights users on 6/10. 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.
Wed 11/193:10 pmSEA - SOF
1 stop21h 35mLufthansa
Tue 12/26:00 amSOF - SEA
1 stop16h 10mLufthansa
Deal found 6/10$598
This Air Canada deal was found by Cheapflights users on 6/11. 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.
Sat 11/83:10 pmSEA - SOF
2 stops41h 10mAir Canada
Wed 11/196:15 amSOF - SEA
2 stops37h 01mAir Canada
Deal found 6/11$599
This United Airlines deal was found by Cheapflights users on 6/9. 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 11/193:10 pmSEA - SOF
1 stop17h 10mUnited Airlines
Wed 12/32:30 pmSOF - SEA
2 stops20h 01mUnited Airlines
Deal found 6/9$609
This American Airlines deal was found by Cheapflights users on 6/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/86:50 pmSEA - SOF
1 stop35h 30mAmerican Airlines
Wed 11/193:00 pmSOF - SEA
1 stop35h 55mAmerican Airlines
Deal found 6/11$646
This Justfly.com deal was found by Cheapflights users on 6/11. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/82:00 pmSEA - SOF
1 stop18h 15mMultiple Airlines
Wed 11/196:15 amSOF - SEA
2 stops22h 11mMultiple Airlines
Deal found 6/11$652
This SWISS deal was found by Cheapflights users on 6/10. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/114:25 pmSEA - SOF
1 stop31h 40mSWISS
Wed 9/310:50 amSOF - SEA
2 stops20h 04mSWISS
Deal found 6/10$694
This Turkish Airlines deal was found by Cheapflights users on 6/10. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/712:30 pmSEA - SOF
1 stop21h 55mTurkish Airlines
Fri 8/293:35 pmSOF - SEA
1 stop35h 40mTurkish Airlines
Deal found 6/10$779

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 June 12, 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

Wed 11/19

3:10 pm-10:45 pm

1 stop21h 35m

Sofia

Tue 12/2

6:00 am-12:10 pm

1 stop16h 10m

$598

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 11/8

3:10 pm-6:20 pm

2 stops41h 10m

Sofia

Wed 11/19

6:15 am-9:16 am

2 stops37h 01m

$599

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 11/19

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Wed 12/3

2:30 pm-12:31 am

2 stops20h 01m

$609

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 11/8

6:50 pm-4:20 pm

1 stop35h 30m

Sofia

Wed 11/19

3:00 pm-4:55 pm

1 stop35h 55m

$646

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 11/8

2:00 pm-6:15 pm

1 stop18h 15m

Sofia

Wed 11/19

6:15 am-6:26 pm

2 stops22h 11m

$652

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 8/11

4:25 pm-10:05 am

1 stop31h 40m

Sofia

Wed 9/3

10:50 am-8:54 pm

2 stops20h 04m

$694

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 8/7

12:30 pm-8:25 pm

1 stop21h 55m

Sofia

Fri 8/29

3:35 pm-5:15 pm

1 stop35h 40m

$779

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 7/18

10:50 am-4:20 pm

2 stops43h 30m

$369

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sat 7/26

12:05 pm-12:00 pm

2 stops37h 55m

$522

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 7/18

7:10 pm-2:45 pm

1 stop33h 35m

$630

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/10

Showing 1-10 of 11 results
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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 June 9, 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 44 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 $1,203). 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 June 12, 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 June 12, 2025.
Peruse reviews from past customers who have flown with SWISS, United Airlines and Turkish Airlines from Seattle to Sofia to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
SWISS
7.5
Good
1,623 reviews
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
United Airlines
7.4
Good
8,790 reviews
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Turkish Airlines
7.3
Good
3,848 reviews
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Air Canada
7.1
Good
9,531 reviews
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight
Lufthansa
6.8
Okay
7,136 reviews
SWISS
7.5
Good
1,623 reviews

Entertainment

6.7

Boarding

7.6

Comfort

7.4

Food

7.0

Overall

7.5

Crew

8.2

Reviews

1 / 20
10.0
Excellent

Elwyn,Feb 2025

MXP - ZRH

The crew and the entire experience was fantastic! Would highly recommend the company and the flight

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 $613. Other airlines that can offer you cheap pricing are Lufthansa, from $633, and SWISS, from $694. United Airlines is 35% 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 $522 on United Airlines. Other airlines that offer cheap prices include Turkish Airlines from $630 and Lufthansa from $1,052 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 $1,203). 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

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Alternative routes for Seattle to Sofia

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

Top 4 airlines flying from Seattle to Sofia

Discover the top 4 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 June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$678Average$1,054FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$686Average$1,114FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$700Average$983FlexibilityNo cancel feeOn-time77%
KLMCheapest$719Average$1,023FlexibilityNo cancel feeOn-time75%

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