IAD - SOF

$300 Find Cheap Flights from Washington Dulles Airport to Sofia - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to Sofia departing on 8/2. 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, 0 bags

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

Cheapest round-trip
$858
Typical prices: $793-$653
Multiple Airlines
Fri 9/11Thu 10/8
IAD - SOF • 2 stops
Cheapest one-way
$300
Typical prices: $404-$501
Multiple Airlines
Sun 8/2
IAD - SOF • 3 stops
Top airlines
Cheapest • from $859 (round-trip)
Best reviews • 7.6 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Dulles Intl and Sofia. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $710 (round-trip)
Shortest trip • 12h 09m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 49% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 29% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Sofia!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Dulles Intl to Sofia (IAD-SOF)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl 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 Dulles Intl to Sofia

Fri, Sep 11 - Thu, Oct 8
Multiple Airlines Logo
11:20 pm - 1:15 am
IAD
-
SOF
18h 55m
2 stops
Multiple Airlines Logo
7:30 pm - 3:40 pm
SOF
-
IAD
27h 10m
1 stop
$858Multiple Airlines
Sun, Sep 13 - Tue, Oct 6
SWISS Logo
8:20 pm - 12:15 pm
IAD
-
SOF
32h 55m
1 stop
SWISS Logo
12:55 pm - 4:45 pm
SOF
-
IAD
34h 50m
2 stops
$859SWISS
Mon, Aug 31 - Tue, Oct 6
United Airlines Logo
5:30 pm - 12:10 pm
IAD
-
SOF
11h 40m
1 stop
United Airlines Logo
6:10 am - 7:00 pm
SOF
-
IAD
19h 50m
2 stops
$861United Airlines
Wed, Sep 16 - Wed, Oct 7
United Airlines Logo
8:18 am - 12:10 pm
IAD
-
SOF
20h 52m
2 stops
United Airlines Logo
6:20 am - 4:05 pm
SOF
-
IAD
16h 45m
1 stop
$862United Airlines
Thu, Aug 6 - Thu, Aug 20
United Airlines Logo
1:15 pm - 12:10 pm
IAD
-
SOF
15h 55m
2 stops
United Airlines Logo
6:10 am - 9:20 pm
SOF
-
IAD
22h 10m
2 stops
$863United Airlines
Wed, Aug 5 - Wed, Aug 19
Multiple Airlines Logo
9:55 am - 6:05 pm
IAD
-
SOF
25h 10m
2 stops
Multiple Airlines Logo
6:10 am - 1:35 pm
SOF
-
IAD
14h 25m
2 stops
$864Multiple Airlines
Wed, Sep 16 - Wed, Sep 30
Air Canada Logo
12:43 pm - 6:40 pm
IAD
-
SOF
22h 57m
2 stops
Air Canada Logo
12:55 pm - 7:00 pm
SOF
-
IAD
37h 05m
2 stops
$865Air Canada
Tue, Sep 15 - Sat, Oct 10
Multiple Airlines Logo
11:20 pm - 1:15 am
IAD
-
SOF
18h 55m
2 stops
Multiple Airlines Logo
9:50 pm - 3:30 pm
SOF
-
IAD
24h 40m
1 stop
$866Multiple Airlines
Tue, Aug 11 - Mon, Sep 7
Multiple Airlines Logo
8:30 pm - 11:05 pm
IAD
-
SOF
19h 35m
2 stops
Multiple Airlines Logo
6:45 pm - 3:10 pm
SOF
-
IAD
27h 25m
2 stops
$867Multiple Airlines
Sun, Aug 30 - Thu, Oct 1
United Airlines Logo
10:20 pm - 6:40 pm
IAD
-
SOF
13h 20m
1 stop
United Airlines Logo
2:10 pm - 12:58 am
SOF
-
IAD
17h 48m
2 stops
$868United Airlines
Booking Insights

KAYAK's insights & trends for Dulles Intl to Sofia flights

Get data-powered insights and trends into flights from Dulles Intl 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. Dulles Intl Airport 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. Dulles Intl Airport to Sofia departing in September.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport to Sofia is February, where tickets cost $566 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $1,162 and $1,112 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport 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. Dulles Intl Airport 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. Dulles Intl Airport to Sofia, you should book around 3 weeks before departure, which saves you about 49% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 15 weeks before departure.

Good to know

Low seasonFebruary
Cheapest flight$300
Best time to beat the crowds with an average 30% drop in price.
Most popular time to fly with an average 44% increase in price.
Flight from Washington Dulles Airport to Sofia

When to book flights from Dulles Intl to Sofia

Are your dates flexible? Find out the best times to travel from Dulles Intl 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 Washington Dulles Airport to Sofia flights

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

    In the last 5 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to Sofia was $300 for a one-way ticket and $858 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and Sofia?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in Sofia.

  • Which airports will I be using when flying from Washington Dulles Airport to Sofia?

    When flying out of Washington Dulles Airport you will be using Washington, D.C. Dulles Intl. You will be landing at Sofia, also known as Sofia.

  • Which aircraft models fly most regularly from Washington Dulles Airport to Sofia?

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

  • Which airline alliances offer flights from Washington Dulles Airport to Sofia?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and Sofia.

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

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to Sofia are Austrian Airlines and Turkish Airlines. With an average price for the route of $1,252 and an overall rating of 7.6, Austrian Airlines is the most popular choice. Turkish Airlines is also a great choice for the route, with an average price of $664 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport 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 Dulles Airport to Sofia.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Sofia from Washington Dulles Airport 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 Dulles Airport 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 Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SOF can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport 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 Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Dulles Intl 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 Dulles Intl 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 935 reviews
7.3Comfort
6.8Food
6.8Entertainment
7.6Boarding
8.1Crew
Airline reviews

The crew was attentive. The food was delicious. The flight was smooth.

10.0 ExcellentAnonymous, Jun 2026
VIE - FRA
Read more Austrian Airlines reviews

The crew was attentive. The food was delicious. The flight was smooth.

The preboarding and the gate organizing management was poor, unorganized and mismanaged. While standing in the business line I kept getting ignored and the personnel kept checking in others, right in front of me until I finally spoke up and pointed out their clear signs of ignoring me while patiently waiting to be checked in. Once checked in the gate the personnel kept chit-chatting and not managing which group is to board, being totally nonchalant, unorganized and behaving amateur-like . Very unprofessional and unlike the quality the Austrian Airlines brand otherwise provides. The crew on the plane are always fantastic and the best. What a shame the crew on the ground was so mediocre.

Absolutely the worst food I've ever had on any flight. Otherwise, the flight is OK - just your regular transatlantic economy. Condor should stop saving pennies on meals. They save a penny, lose a dollar.

The layover period at Frankfurt of one hour and forty minutes was not enough time to clear the two-hour line at passport control: we missed the flight to San Francisco. Condor did a good job rebooking us that same day, but our bags ended up in Los Angeles.

This is truly the worst travel experience of my life. The UK ETA program had a technical failure, and I was stuck in limbo for 24 hours, unable to board my flight and unable to navigate anything in my itinerary. I had to rebook an entirely new flight and I’m now out doubled the money. Unconscionable.

OK, would prefer some meat for dinner, not just pasta although was tasty. There was only one dish, no choices

Flight delayed with no explanation. Boarding was confused (proceed to plane, go back to waiting area).

Accommodate the passangers at the gates. They only allow groups 1-3 to sit near/at the gate. We had to wait 3 HRs an had to look for a seat far away from the gate. Other than that was like other Airports.

It was a great experience. The aircraft is a bit dated but other than that it was great.

Last few years I didn't not have great experience with United Airlines.

Entertainment system is okay, flight attendants were ok. Leg space very narrow, I couldn’t get what I wanted to eat, dinner nor breakfast.

Excellent experience with business class area. Staff was attentive and food was amazing. Only one bathroom for business class which was logistically difficult for the staff while preparing meals. Need to offer fluids with meals. I did not get enough water to drink. But overall I rate it 5 star.

On time, great food, good drink selection! Only down was alcohol-free lounge. Lufthansa had a much better offering!

Be honest of what you sell: This was sold as Business Class on all three legs, while the JetBlue plane didn't even have business class seats, and wanted $164 for extra legroom seats.

Seat assignments for family traveling with 2 children. Loud crowd during sleep time

It was crowded… the bathrooms dirty and smelly. The seats have been made even smaller.

delayed to take off from detroit by 3 hours lost baggage in istanbul and now in venice without baggage

Seats were very tight with poor legroom - and I am average height. During the 12 hour flight, tiny paper cups of drinks we're only offered during the super and breakfast services, with the crew nowhere to be seen in between. One of the bathrooms was out of order, leading to long lines waiting to use the remaining two available to the economy class passengers.

short flight but we still got a very nice lunch and the crew did an excellent job in taking care of us

For that price on Business class, I expected to have the pod seats. These were configured as 2/3/2 and my seat mate talked half the flight with a friend across the isle, loudly. Very uncouth.

Like: departed and arrived on time. Unlike: Food options for purchase allways bad, 1 of 2 of the crew members not very friendly at all. Seats and leg room aweful. At this point I am thinking on switching to AA.

Our flight was canceled same day and we were never informed. Had to pay more and worse seating on another airline.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

Vegetarian selection could be better. Bread was too hard to chew.

Crew was friendly and competent. Food, wine, and entertainment were excellent except the raw tuna on the flight to Split. Recommend against serving that - at least as the only option. Many medical conditions do not allow people to eat raw fish.

United didn’t even try to hold the flight for me. They knew I had a tight connection and when I arrived at the gate less than 10 mins after final boarding the flight had already gone. The gate agent wasn’t even notified that I was on my way. She was told I wasn’t at the airport

Good quick flight on a small but comfortable plane. I'm 6'3 and had plenty of space.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

We sat in our seats on the tarmac for almost 3 hours due to storms. They would not give us water or a snack. We were to depart at 7.30 pm and it was about 10.30 when we took off. No dinner until much after that. Beef type noodle dish was terrible with about a teaspoon of beef in it. The breakfast sweet waffle with egg and sausage inside was horrible. An English muffin sandwich would have been much better. Food was the worst in all of our years of traveling the world.

Our screen kept turning off ...3 times...had to get crew attention to turn it on again

They messed up my seat so I didn’t get the one I paid for

Put me on standby; flight was late; missed my connecting flight; disaster

Flight attendants were fine, seats a bit hard but I use a cushion for extra support. The only issue was it was a bit too cool and I needed to ask for and received and extra blanket. I survived!!!

Very few things and/or people are excellent. It was very good.

Extremely uncomfortable seats. Experience was like a Frontier Airlines flight. Would not fly it again.

Very, very tight legroom. They must’ve jammed in an additional few rows of seat seating. Denver to Munich was the least legroom I’ve ever had on any flight, let alone a multi hour international journey. I will not take that flight again.

In my first flight with Air Canada we sat in the plane for 4:00pm to 6:30pm. Finally we were asked to get off the plane and we were told the flight was cancelled after 7:00pm There was o clear explanation of what was the problem. I was booked without my permission on a Delta Flight at 7:30pm that was leaving at 8:00pm and I still had to go get my luggage(my final destination was Rome with one stop in Toronto. The luggage claim for Canada was closed so had to return to finally get it on the luggage belt.. Of course I missed the Delta flight and all the next day flights were booked. I also lost what I paid for my stay in Rome because I did nt cancel in time. A complete nightmare.

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Everything you need to know for your flight from Dulles Intl to Sofia

Information on your arrival and departure airports