$841 Cheap Flights from Washington (IAD) to Chiang Rai (CEI)

View $841 flight on Thu, May 8, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from Washington to Chiang Rai (IAD-CEI)

Prices were available within the past 7 days and start at $841 for one-way flights and $1,334 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,334 Roundtrip, found 4 days ago
$1,334
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,334 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,336 Roundtrip, found 4 days ago
$1,336
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,336 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,338 Roundtrip, found 4 days ago
$1,338
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,338 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,394 Roundtrip, found 4 days ago
$1,394
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,394 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,396 Roundtrip, found 4 days ago
$1,396
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,396 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,398 Roundtrip, found 4 days ago
$1,398
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,398 found 4 days ago
Qatar Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,400 Roundtrip, found 4 days ago
$1,400
Roundtrip
found 4 days ago
Select Qatar Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,400 found 4 days ago
Ethiopian Airlines
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,659 Roundtrip, found 4 days ago
$1,659
Roundtrip
found 4 days ago
Select Ethiopian Airlines flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,659 found 4 days ago
Etihad Airways
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$1,749 Roundtrip, found 4 days ago
$1,749
Roundtrip
found 4 days ago
Select Etihad Airways flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $1,749 found 4 days ago
Lufthansa
Thu, May 15 - Fri, May 30
IAD
Washington
CEI
Chiang Rai
$2,217 Roundtrip, found 4 days ago
$2,217
Roundtrip
found 4 days ago
Select Lufthansa flight, departing Thu, May 15 from Washington to Chiang Rai, returning Fri, May 30, priced at $2,217 found 4 days ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI) cost?
Discover the latest flight deals from IAD to CEI by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from IAD to CEI?
The cheapest flights from IAD to CEI are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from IAD to CEI?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from IAD to CEI. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI)?
You’ll need to take a flight with a layover when traveling from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from IAD to CEI?
Friday is generally the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can change based on a range of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI)?
Select a flight from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI) that takes off before 3 PM to reduce the likelihood of delays. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG’s global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI) last-minute?
Last-minute bookings from IAD to CEI are usually more expensive. To lock in the best prices, start looking for flights as early as possible. That being said, if you can play around with your travel dates, you may find a cheap ticket just before your departure.
Is it cheaper to book an IAD to CEI flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to CEI flight and hotel package with Expedia could result in significant savings. What’s more, having everything in one easy place takes the hassle out of planning your trip. Simply pick your flights and select from our wide range of hotels, then customize your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Chiang Rai Intl. Airport (CEI)?
In most cases, you can cancel or modify your IAD to CEI flight. However, there may be additional charges, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline’s rules and fees on flight changes, or if you’d like further details, visit our Customer Service portal.
*Available to One Key members.