The cheapest times to fly from IAD to VTE are

  • January 15th to February 11th (except the week of January 22nd)
  • February 26th to March 18th
  • July 30th to December 9th

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 VTE is early to mid October. Prices can be as high as $4492 for Sunday flights during late May to early June, or as low as $1074 for Tuesday flights around early to mid October.


When to Fly to Vientiane

Flying from Washington, DC (IAD) to Vientiane (VTE) will usually cost between $1148 to $3262 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid October with an average ticket price of $1172. Due to high demand the most expensive time to fly is late May to early June, with an average price of $2810. Planning your trip to low-cost times can easily save you $1638 on economy flights and even more on first-class flights. Generally, any price below $1437 can be considered a good price for a round-trip IAD to VTE flight.

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

IAD to VTE Flight Prices

Compared to other flights, the IAD to VTE flight is slightly 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 $0.11, which is far below average.


Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly to Vientiane, and Thursdays are the most expensive days to return to Washington. Selecting flights on the least expensive days could save you up to $719 (29%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $1395. Return trip prices are from the VTE 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 VTE can generally find a 1-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 16 hour 17 minutes may not be realistic.


Flight Hacking IAD to VTE

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 VTE — but Champion Traveler does!

Hack #1: Bangkok (IAD > BKK > VTE)

  • Price for both tickets: $1042
  • Average savings: $395 (27.49%)

See IAD to BKK flights

Hack #2: Shanghai (IAD > PVG > VTE)

  • Price for both tickets: $1136
  • Average savings: $301 (20.95%)

See IAD to PVG flights

Hack #3: Hanoi (IAD > HAN > VTE)

  • Price for both tickets: $1149
  • Average savings: $288 (20.04%)

See IAD to HAN flights


Flight Questions Answered

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

Which airlines fly this route?

You can find 33 major airlines flying this route most often: Aeroflot, Air Canada, Air France, Alaska, ANA, Asiana, Austrian, Bangkok Airways, British Airways, Brussels Airlines, Cathay Dragon, Cathay Pacific, China Airlines, China Eastern, China Southern, Delta, Emirates, Ethiopian, Etihad, EVA Air, Hainan, JAL, KLM, Korean Air, Lao Airlines, Lufthansa, Qantas, Qatar Airways, Singapore Airlines, SWISS, THAI, United, Vietnam Airlines, and potentially more during busy seasons.

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

The distance between the two airports is roughly 8501 miles or 13681 kilometers.

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

The real-world flight time for a nonstop IAD to VTE flight is about 16 hour 17 minutes.

How many flights go between Washington, DC and Vientiane?

It depends on the day of the week and the date, but a typical day might have around 74 available flights from IAD to VTE.


Airport Location Info


Departing Airport

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

Return Airport

Destination codeVTE
Destination airport nameWattay International 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.