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$517+ Cheap flights from Washington 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 8/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Washington to Sofia

Keep the following information in mind while searching for Washington to Sofia flight deals. Data was last updated May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$618
(SWISS)

One-way from

$517
(American Airlines)

Popular in

December

Cheapest in

April

Average price

$1,021
Provider with most accurate pricing for Seattle/Tacoma Intl-Sofia flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sofia flights.
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From Washington to Sofia
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One-way flight from Washington to Sofia
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Highest demand for flights based on searches. 1% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Find flight deals from Washington to Sofia

Cheapest flights from Washington to Sofia
Explore the most affordable flight options available from Washington to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This SWISS deal was found by Cheapflights users on 5/1. 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.
Tue 10/218:30 amPDX - SOF
2 stops39h 35mSWISS
Mon 11/33:00 pmSOF - PDX
2 stops41h 08mSWISS
Deal found 5/1$618
This Lufthansa deal was found by Cheapflights users on 5/1. 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 10/2210:00 amPDX - SOF
2 stops21h 50mLufthansa
Mon 11/36:55 pmSOF - PDX
2 stops38h 19mLufthansa
Deal found 5/1$633
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Tue 10/217:00 amPDX - SOF
3 stops25h 40mUnited Airlines
Mon 11/31:45 pmSOF - PDX
2 stops38h 51mUnited Airlines
Deal found 5/1$634
This Air Canada deal was found by Cheapflights users on 5/1. 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.
Tue 10/213:25 pmPDX - SOF
2 stops17h 15mAir Canada
Sun 11/25:05 amSOF - PDX
2 stops37h 29mAir Canada
Deal found 5/1$660
This Air Canada deal was found by Cheapflights users on 5/1. 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.
Fri 10/243:25 pmPDX - SOF
2 stops17h 15mMultiple Airlines
Fri 10/312:15 pmSOF - PDX
3 stops33h 29mMultiple Airlines
Deal found 5/1$735
This FlightHub deal was found by Cheapflights users on 4/30. 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.
Mon 9/227:10 pmSEA - SOF
1 stop15h 15mTurkish Airlines
Thu 10/99:25 amSOF - SEA
1 stop17h 50mTurkish Airlines
Deal found 4/30$751
This KLM deal was found by Cheapflights users on 5/1. 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.
Fri 10/241:05 pmPDX - SOF
1 stop14h 55mKLM
Sat 11/17:00 amSOF - PDX
2 stops23h 54mKLM
Deal found 5/1$763
This British Airways deal was found by Cheapflights users on 5/1. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:25 pmPDX - SOF
1 stop32h 05mBritish Airways
Sun 10/199:10 pmSOF - PDX
1 stop30h 25mBritish Airways
Deal found 5/1$770
This Gotogate deal was found by Cheapflights users on 4/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/56:50 pmSEA - SOF
1 stop18h 10mLufthansa
Sun 9/286:20 amSOF - SEA
2 stops25h 56mLufthansa
Deal found 4/30$775
This Gotogate deal was found by Cheapflights users on 4/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/226:50 pmSEA - SOF
1 stop18h 10mMultiple Airlines
Sun 9/146:20 amSOF - SEA
2 stops25h 56mMultiple Airlines
Deal found 4/30$785
This United Airlines deal was found by Cheapflights users on 5/1. 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.
Fri 9/57:05 amSEA - SOF
3 stops25h 35mUnited Airlines
Sun 9/286:20 amSOF - SEA
2 stops37h 01mUnited Airlines
Deal found 5/1$793
This Justfly.com deal was found by Cheapflights users on 4/30. 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.
Fri 8/2212:10 pmSEA - SOF
2 stops37h 05mAir Canada
Sun 9/146:20 amSOF - SEA
2 stops25h 56mAir Canada
Deal found 4/30$799

Cheapflights Fare Finder

Customize your flight search to find flights from Washington 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 May 1, 2025.
Use the filters below to find and compare flights from Washington to Sofia that are best for you.

Fly from

Washington

Fly to

Sofia

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/21

8:30 am-10:05 am

2 stops39h 35m

Sofia

Mon 11/3

3:00 pm-10:08 pm

2 stops41h 08m

$618

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 10/22

10:00 am-5:50 pm

2 stops21h 50m

Sofia

Mon 11/3

6:55 pm-11:14 pm

2 stops38h 19m

$633

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/21

7:00 am-6:40 pm

3 stops25h 40m

Sofia

Mon 11/3

1:45 pm-6:36 pm

2 stops38h 51m

$634

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/21

3:25 pm-6:40 pm

2 stops17h 15m

Sofia

Sun 11/2

5:05 am-9:34 am

2 stops37h 29m

$660

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 10/24

3:25 pm-6:40 pm

2 stops17h 15m

Sofia

Fri 10/31

2:15 pm-2:44 pm

3 stops33h 29m

$735

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 9/22

7:10 pm-8:25 pm

1 stop15h 15m

Sofia

Thu 10/9

9:25 am-5:15 pm

1 stop17h 50m

$751

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 10/24

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Sat 11/1

7:00 am-9:54 pm

2 stops23h 54m

$763

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 10/8

7:25 pm-1:30 pm

1 stop32h 05m

Sofia

Sun 10/19

9:10 pm-5:35 pm

1 stop30h 25m

$770

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 9/5

6:50 pm-11:00 pm

1 stop18h 10m

Sofia

Sun 9/28

6:20 am-10:16 pm

2 stops25h 56m

$775

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 8/22

6:50 pm-11:00 pm

1 stop18h 10m

Sofia

Sun 9/14

6:20 am-10:16 pm

2 stops25h 56m

$785

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 25 results
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Best time to book a flight from Washington to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Washington 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 Washington to Sofia

What is the cheapest month to book a flight from State of Washington to Sofia?

Currently, November is the cheapest month in which you can book a flight from State of Washington to Sofia (average of $632). Flying from State of Washington to Sofia in June is currently the most expensive (average of $1,218). 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 WA to SOF?

Find hourly flight availability from Washington 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 May 1, 2025.

When flying from State of Washington to Sofia, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 May 1, 2025.
Read through reviews of airlines operating flights from Washington to Sofia, such as KLM, Austrian Airlines and SWISS. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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
1,334 reviews
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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
781 reviews
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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
1,588 reviews
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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.
Air France
7.4
Good
1,446 reviews
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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
8,696 reviews
KLM
7.8
Good
1,334 reviews

Overall

7.8

Entertainment

7.1

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.2

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 Washington to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Washington?

    Located just 4.2 mi from the city center, Sofia (SOF) is the airport most travelers will use when flying to Sofia from Washington.

  • What are the cheapest airlines to fly from State of Washington to Sofia one-way?

    $517 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on United Airlines and Air Canada, with prices starting from $580 and $970, respectively.

  • What are the most popular routes from State of Washington to Sofia?

    When deciding which route to take from State of Washington to Sofia consider Seattle/Tacoma Intl - Sofia, Portland - Sofia or Spokane - Sofia as they are the most popular.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Sofia?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to Sofia (average of $632). Flying from State of Washington to Sofia in June is currently the most expensive (average of $1,218). 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

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Alternative routes for Washington to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Washington to Sofia

Discover the top 4 airlines that operate flights from Washington 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$563Average$1,090FlexibilityNo cancel feeOn-time69%
KLMCheapest$609Average$979FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$691Average$1,155FlexibilityNo cancel feeOn-time76%
Turkish AirlinesCheapest$700Average$1,015FlexibilityNo cancel feeOn-time77%

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