The cheapest times to fly from IAD to ZYL are

  • March 19th to May 13th
  • July 16th to October 21st (except the week of October 8th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from IAD to ZYL is late September. Prices can be as high as $7245 for Wednesday flights during early to mid December, or as low as $990 for Monday flights around late September.


When to Fly to Sylhet

Flying from Washington, DC (IAD) to Sylhet (ZYL) will usually cost between $1025 to $5357 per person if booking more than four weeks in advance. On average the very cheapest time to fly is late September with an average ticket price of $1015. Due to high demand the most expensive time to fly is early to mid December, with an average price of $5091. Planning your trip to low-cost times can easily save you $4076 on economy flights and even more on first-class flights. Generally, any price below $1644 can be considered a good price for a round-trip IAD to ZYL flight.

See below for a graph of average weekly prices for the IAD to ZYL route. All prices are for round-trip tickets in USD.

IAD to ZYL Flight Prices

Compared to other flights, the IAD to ZYL flight is more expensive than the average and costs slightly more than the average flight leaving from Washington. The average price per mile (for a direct flight) is $0.13, which is far below average.


Flight Prices by Day of the Week

Monday is usually the cheapest day to fly to ZYL, and Wednesday the cheapest day to fly back into IAD. Wednesdays are the most expensive days to fly to Sylhet, and Mondays are the most expensive days to return to Washington. Selecting flights on the least expensive days could save you up to $4615 (34%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Monday and returning a week later will cost an average of $1824. Return trip prices are from the ZYL to IAD flight, and often highlight the quality of our data in showing the same trend.

Departing Prices by Day

Departure Day Prices

Return Trip Prices by Day

Return Day Prices


Nonstop Flights and Layovers

Travelers looking to fly from IAD to ZYL can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 15 hour 19 minutes may not be realistic.


Alternative Nearby Airports

Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from IAD to ZYL while comparing.

Destination alternative #1: Hazrat Shahjalal International Airport (DAC) in Dhaka

  • 121 miles (195 km) away from ZYL
  • Usually 42.91% less expensive than ZYL
  • 1-layover flights available

See IAD to DAC flights

Destination alternative #2: Guwahati International Airport (GAU) in Guwahati

  • 81 miles (130 km) away from ZYL
  • Usually 27.80% less expensive than ZYL
  • 1-layover flights available

See IAD to GAU flights


Flight Hacking IAD to ZYL

Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from IAD to ZYL — but Champion Traveler does!

Hack #1: Dhaka (IAD > DAC > ZYL)

  • Price for both tickets: $1150
  • Average savings: $494 (30.05%)

See IAD to DAC flights

Hack #2: Muscat (IAD > MCT > ZYL)

  • Price for both tickets: $1306
  • Average savings: $339 (20.59%)

See IAD to MCT flights

Hack #3: Dubai (IAD > DXB > ZYL)

  • Price for both tickets: $1335
  • Average savings: $310 (18.83%)

See IAD to DXB flights


Flight Questions Answered

Still have questions about flying from IAD to ZYL? We’ve got answers.

Which airlines fly this route?

You can find 16 major airlines flying this route most often: Air Canada, Air India, Avianca, Biman, British Airways, Cathay Dragon, Cathay Pacific, Delta, Emirates, Etihad, JetBlue, MEA, Royal Brunei, Saudia, Turkish Airlines, United, and potentially more during busy seasons.

How far away is it from Savannakhet Airport to Washington Dulles International Airport?

The distance between the two airports is roughly 7966 miles or 12820 kilometers.

How long does it take to fly from IAD to ZYL?

The real-world flight time for a nonstop IAD to ZYL flight is about 15 hour 19 minutes.

How many flights go between Washington, DC and Sylhet?

It depends on the day of the week and the date, but a typical day might have around 18 available flights from IAD to ZYL.


Airport Location Info


Departing Airport

Origination codeIAD
Origination airport nameWashington Dulles International Airport
CityWashington, DC
Countrythe United States

Return Airport

Destination codeZYL
Destination airport nameSavannakhet Airport


Other Resources

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.