WAS - SOF

$448 Find Cheap Flights from Washington, D.C. to Sofia

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Washington, D.C. to Sofia departing on 12/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Sofia

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sofia.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to Sofia.
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Everything you should know

Cheapest round-trip
$493
Typical prices: $672-$738
Multiple Airlines
Wed 1/21Wed 2/4
IAD - SOF • 2 stops
Cheapest one-way
$448
Typical prices: $491-$617
Lufthansa
Tue 12/30
IAD - SOF • 1 stop
Top airlines
Turkish Airlines
Cheapest • from $503 (round-trip)
Austrian Airlines
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
November
Cheapest • 21% price drop
June
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Washington, D.C. to Sofia (WAS-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Washington, D.C. to Sofia that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Washington, D.C. to Sofia

Wed, Jan 21 - Wed, Feb 4
Multiple Airlines Logo
9:45 am - 10:45 pmIAD-SOF
30h 00m2 stops
Multiple Airlines Logo
6:10 am - 8:59 pmSOF-IAD
21h 49m2 stops
$493Multiple Airlines
Find Deal
Mon, Nov 24 - Mon, Dec 8
Multiple Airlines Logo
10:55 pm - 6:20 pmIAD-SOF
12h 25m1 stop
Multiple Airlines Logo
7:55 am - 2:40 pmSOF-IAD
13h 45m1 stop
$501Multiple Airlines
Find Deal
Wed, Nov 5 - Sun, Nov 23
Turkish Airlines Logo
1:30 pm - 8:45 amIAD-SOF
12h 15m1 stop
Turkish Airlines Logo
9:35 am - 11:45 amSOF-IAD
33h 10m1 stop
$503Turkish Airlines
Find Deal
Mon, Nov 17 - Wed, Dec 3
Multiple Airlines Logo
4:10 pm - 1:15 pmDCA-SOF
14h 05m2 stops
Multiple Airlines Logo
2:00 pm - 9:56 pmSOF-DCA
14h 56m2 stops
$504Multiple Airlines
Find Deal
Thu, Jan 22 - Thu, Feb 5
Turkish Airlines Logo
1:30 pm - 8:45 amIAD-SOF
12h 15m1 stop
Turkish Airlines Logo
9:35 am - 7:20 pmSOF-IAD
16h 45m1 stop
$512Turkish Airlines
Find Deal
Sat, Jan 17 - Sat, Jan 31
Lufthansa Logo
6:00 pm - 1:40 pmIAD-SOF
12h 40m1 stop
Lufthansa Logo
6:25 am - 3:50 pmSOF-IAD
16h 25m1 stop
$516Lufthansa
Find Deal
Sun, Nov 23 - Sat, Dec 6
Lufthansa Logo
10:55 pm - 10:45 pmIAD-SOF
16h 50m1 stop
Lufthansa Logo
6:25 am - 3:50 pmSOF-IAD
16h 25m1 stop
$523Lufthansa
Find Deal
Mon, Nov 24 - Sat, Dec 6
United Airlines Logo
10:55 pm - 6:20 pmIAD-SOF
12h 25m1 stop
United Airlines Logo
6:25 am - 4:21 pmSOF-IAD
16h 56m2 stops
$528United Airlines
Find Deal
Wed, Jan 7 - Sun, Jan 18
United Airlines Logo
10:55 pm - 6:20 pmIAD-SOF
12h 25m1 stop
United Airlines Logo
6:10 am - 8:59 pmSOF-IAD
21h 49m2 stops
$529United Airlines
Find Deal
Sun, Nov 23 - Sun, Dec 7
SWISS Logo
8:30 pm - 6:20 pmIAD-SOF
14h 50m2 stops
SWISS Logo
11:00 am - 4:40 pmSOF-IAD
12h 40m1 stop
$536SWISS
Find Deal
Booking Insights

KAYAK's insights & trends for Washington, D.C. to Sofia flights

Get data-powered insights and trends into flights from Washington, D.C. to Sofia to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Washington, D.C. to Sofia?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Washington, D.C. to Sofia departing in January.

What’s the cheapest day of the week to fly from Washington, D.C. to Sofia?

The average price of all round-trip flights from Washington, D.C. to Sofia clicked on KAYAK for each day over the last 12 months.

When flying from Washington, D.C. to Sofia, you should consider leaving on a Wednesday and avoid Saturdays if you are looking for the best rates. For your return to Washington, D.C., you’ll find the best rates on Wednesdays and the most expensive ones on Fridays.

What is the cheapest month to fly from Washington, D.C. to Sofia?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. to Sofia, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. to Sofia is November, where tickets cost $607 (return) on average. On the other hand, the most expensive months are December and June, where the average cost of round-trip tickets is $1,060 and $1,010 respectively.

How far in advance should I book a flight from Washington, D.C. to Sofia?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. to Sofia, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. to Sofia, you should book around 1 week before departure. For the absolute cheapest price, our data suggests you should book 7 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$448
Best time to beat the crowds with an average 20% drop in price.
Most popular time to fly with an average 31% increase in price.
Flight from Washington Dulles Airport to Sofia

When to book flights from Washington, D.C. to Sofia

Are your dates flexible? Find out the best times to travel from Washington, D.C. to Sofia based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Washington, D.C. to Sofia

  • What is the cheapest flight from Washington, D.C. to Sofia?

    In the last 3 days, the lowest price for a flight from Washington, D.C. to Sofia was $448 for a one-way ticket and $493 for a round-trip.

  • Do I need a passport to fly between Washington, D.C. and Sofia?

    Yes

  • Which airports will I be using when flying from Washington, D.C. to Sofia?

    Washington, D.C. is served by 2 major airports and there is only 1 main airport in Sofia. You will leave Washington, D.C. from one of these airports: Washington, D.C. Reagan-National or Washington, D.C. Dulles Intl. You will be arriving at Sofia.

  • Which aircraft models fly most regularly from Washington, D.C. to Sofia?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Washington, D.C. to Sofia?

    Star Alliance is the only airline alliance operating flights between Washington, D.C. and Sofia.

  • Which is the best airline for flights from Washington, D.C. to Sofia, Austrian Airlines or SWISS?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Sofia are Austrian Airlines and SWISS. With an average price for the route of $814 and an overall rating of 7.6, Austrian Airlines is the most popular choice. SWISS is also a great choice for the route, with an average price of $815 and an overall rating of 7.5.

  • How does KAYAK find such low prices on flights from Washington, D.C. to Sofia?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington, D.C. to Sofia.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington, D.C. to Sofia?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Washington, D.C. is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington, D.C. to Sofia?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Sofia with an airline and back to Washington, D.C. with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington, D.C. to Sofia?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Sofia from Washington, D.C. up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Washington, D.C. to Sofia

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to Sofia. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Washington, D.C. to Sofia? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.6
Austrian AirlinesOverall score based on 860 reviews
8.1Crew
7.3Comfort
6.8Food
7.6Boarding
6.8Entertainment
Airline reviews

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

10.0 ExcellentAnonymous, Oct 2025VIE - EWR
Read more Austrian Airlines reviews

I did wish they would give us the entire little bottle Bailey's instead of just have 1/2 bottle at a time

My layover in Vienna was supposed to be 35 minutes but because my flight was canceled I had to wait in the airport for an additional 8 hours.

Very limited legroom in a 10 hour flight.very old plane.

The flight was delayed for 30 minutes with no apparent reason. There is no entertainment at all, and no USB or electric outlets for charging your phone or tablet.

My flight was canceled and even though I paid אם KAYAK you didn't even answer me and obviously didn't refund my money. I will never buy a ticket through you again.

Accessibility serious problems in Viena airport making it seriousely difficult in in-between gates and boarding travel. Pretens of breakfast and service care in the economy pathetic.

Despite the booked seats in front of the land we were moved to the back of the plane even first like 8 lines were totally without pasangers. When I tried to sit on empty seat flight attendant asked me to go to my dedicated seat in the fully crowded back of the plane. She was not able to explain why. Food was very poor on flight LAX - VIE.

We had a wonderful experience overall. The only issue was check-in our luggage at the Split Airport counter. It was very confusing because we needed to pay for baggage.

Austrian Airlines help and service was fine, but Kayak misled us into believing we had purchased a Business Class ticket. In fact, the tickets were only upgraded Coach Class tickets with luggage restrictions that belonged to the Coach Class. Very disappointed! Paid over $$$$ 9K for the two tickets. Very disappointing!

Quick and organized boarding process, friendly staff but not as many snacks and drinks as the previous flight overnight

Very nice crew and great food. Easy to board just wish the flight could be shorter or seats more comfortable or more room to walk around when you get cramps in your legs from sitting so long. Crew was great and attentive and really was good food.

My experience was wonderful. The professionalism of the crew was exemplary 🙂. The meals were wholesome and tasty. I have no complaints

Food used to be better and comfort was not attainable after 5 hours everything starts hurting.

horrible.. they cause such a problem and my daughter 14 years old was stranded in san francisco

I can’t even the whole trip was a catastrophe

Poor. Seats uncomfortable. No leg room. Hot and humid the whole trip. Food and staffs were ok.

The seats were so close together, when the man in front of me put his seat back, the screen in front of me was 9 inches from my face. There is no way to lean forward if I needed to pick something up. It was pretty uncomfortable for a ten hour flight. I was very surprised.

The food was good. Most the staff was pleasant. The flight would be drastically improved with WiFi on a long international flight.

When I needed to get my bag off of the plane so that I could take a train because the connection was 4 hours later, they took 2 hours to take my bag off making me take the train and miss my flight simultaneously. The seat size on the plane is too small for an average aged woman let alone a middle-aged man. It's unacceptable and I will not fly Boeing again.

The cushion of the seats are old and very thin. The food can be more tasty or come with salt packages

During booking, I kept trying submitting my payment from the Mexican website and it didn't work. After I had the idea to change it to the Canadian website, it worked but I had to be charged the equivalent of 50 CAD more. I received the clear instruction that I would only be able to check-in at the airport and that it was impossible to select a seat 24 hours before departure, that I had to pay 144 CAD to do so, although not only was I able to check-in 24 hours before departure, but I could have selected my seats for free then. All in all, I almost threw $200 out the window due to misleading information. Besides, the app kept crashing, the information to get to the gate on the app was inaccurate, my gate was switched and I was only informed once in the air (luckily I had noticed the departure pannel), I was not addressed in my language beforehand and even if I tried I was immediately answered in English (which meant the crew understood but didn't want to answer accordingly), there was only one snack & beverage service on my medium haul flight and no beverage service on my short haul flight. To be fair, the planes were comfortable, the crew apart from the language issue was helpful, dynamic and engaging, the plane was clean and the directions were clear and direct. United has a lot of potential to be one of my favourite airlines, but the devil is in the details and a lot of them missed the target.

Better WiFi. I cannot understand that in 2025, United is so behind on a technology that is now a necessity and still painfully unreliable, slow and keeps disconnecting.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

Ridiculous boarding. Enter the gate, walk down a staircase with bags, exit a building, get on a crowded bus, dropped off a few meters away from the aircraft, walk with bags to another set of stairs to board the aircraft. And all that during a pouring down rain, and with children. Ridiculous!!!

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

The staff at IST airport could have been more helpful. Too much wasted time and the plane from IST to KHI was just horrible. The plane was not clean and smelled bad!

This is my 2nd time with the Turkish airline. Would definitely recommend. In stability we connected to Indiago would not recommend, very cramped seating. No inflight entertainment..service was inferior.

I wouldn't know what the flight was like. AI canceled my flight reservation!! There's no way to speak to an actual human to fix the issue! NEVER AGAIN! ALWAYS BOOK YOUR FLIGHT DIRECTLY WITH THE AIRLINE NEVER GO THROUGH KAYAK OR JUSTFLY.COM!!

Paying extra for premium seats was wasted. Turkish Airlines takes 2 seats for bassinet. The lady next to me had a baby with bassinet Bassinet was in front of my seat

Rude staff. I would avoid using the word racist but definitely partially or discriminatory. My 72 yrs old mother who is also disabled was traveling on this flight. She was the second passenger boarded to the plane. The First elderly couple ahead of my mother were allowed to use the airplane bathroom but my mother was denied entry stating it was for safety reasons. My mother objected the the couple in front of her were allowed but hostess still stated that due to the flight safety reasons she can’t use it. Even my mother explained that he is using blood pressure medication that’s why she have to use the restroom frequently but the crew continued arguing her. At one point the Mae attendent even suggested that if that’s the case my mother can urinate in her seat. The level of disrespect against an elderly lady is beyond my comprehension. This matter will be taken to the social media to shame the employees involved.

my experience was great with Turkish airlines . the problem i encountered was with kayak booking. When I booked . it showed that im allowed a bag . and when I got to the airport, i had to pay $165 for one bag.

Not up to Business Class standards. Two of the three toilets were out of order. The hostesses were aware and didn’t show any responsible act to do something. Food quality was not what we expect from Turkish hospitality. Overall we were not impressed and disappointed.

During mid flight, try to get a flight attendant to help I couldn’t find one Otherwise, everything was perfect

I was not given basinett seat.The connecting flight was missed due to airline fault i was not accomodated for hotel.Drinks were normt served frewuently.Never travelling again on tirkish airlines.I always travel wiyh family by turkish airline but no more.zero stars

The crew were very hospitable and pleasant. The food was pretty good. Unfortunately, there was a flight delay of more than 2 hours. We're not sure why but it appeared to be outside the control of Turkish Airlines.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

love the crews and my only problem was the delay at Frankfurt was very bad. I have travelled with Lufthansa for over 30 years now and this was cost me some planned business appointment

The flight delay made the connection a bit tight but that's outside the flight crew's control.

We just made it to our connecting flight. A long, long speed walk!

We didn't get the coffee with breakfast in the morning.. 30 mins lazer I asked flight attendant why don't we get coffee now at least.. after the breakfast..she said that captain announced possible turbulences fee minutes ago, which didn't ecplain why we didn't get it with the breakfast..breakfast was very poor btw..just little pastry which you can eat in 4 little bites. Turbulences fortunately didn't even happen.. but we didn't get that more than necessary coffee in the morning after the night flight with very poor sleep.. They just served breakfast 1 hour afzer we took off..at like 11 PM.. that doesn't make sense at all.. Also, flight attendants weren't very nice..they looked like they're not happy with their job.. :/

Lufthansa still has a good level of quality compared to US airlines, especially with respect to (1) food quality - actually tasty, (2) good French red wine - free, (3) good movie selection. Also my ticket price includes 1 free check-in luggage, while some other budget airlines sneak in an extra $150 for a checkin.

I think they overbooked Frankfurt to New York and bumped me off. This changed my return travel I arrived home about 4 hours late. Almost 24 total travel time Totally unacceptable Would not travel with United

We were moved twice on flights to the point we weren’t even on Lufthansa anymore. We had to fly united. Lost paid extra leg room twice. To top it all off we’re forced to pay $375 and $275, respectively for you luggage that was considered sports luggage. We were told it would be Lufthansa fares l, from the united desk, AND WE DIDN'T EVEN HAVE A LUFTHANSA FLIGHT! I’ll be calling once my trip is over on October 7th to all airlines and Kayak. This was ridiculous!

Everything went smoothly and the staff was very kind. I’m glad I purchased the extra leg room for my long flight; it was totally worth it. We were served 2 meals for a 9 hour flight which I was not expecting and they were very tasty. I appreciated them being vegetarian. Customs line in Munich was long; I had a choice to have a 1 hr 40 min layover or 2 hr 40 min layover; I took the longer layover which I was thankful for because my flight was delayed 30 minutes and there’s a good chance I would have missed my connecting flight. This was my very first international flight and I would fly Discover again without hesitation. Thank you for taking good care of me!

I liked everything BUT the temperature. It was freezing and now I am sick.

Everything you need to know for your flight from Washington, D.C. to Sofia

Information on your arrival and departure airports

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