In terms of precipitation, rainfall in Washington, D.C. Reagan-National Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Reagan-National Airport when rainfall is around 66.0 mm.

If weather is an important factor for your trip to Washington, D.C. Reagan-National Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

What is the cheapest time of day to fly from TH to DCA?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Thailand to Washington, D.C. Reagan-National Airport as you normally would.

Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?

Yes. In addition to deals on Thailand to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Thailand to Reagan-National?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thailand to Reagan-National.

Can I find deals for business class flights from Thailand to Reagan-National?

Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

฿18,373+ Cheap Flights from Thailand to Washington, D.C. Reagan-National Airport

Cheap flight deals from Thailand to Reagan-National

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

One-way

Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Mon 9/1109:10 -

2 stops25h 20m

Sun 22/1115:30 -

3 stops32h 00m

Deal found 11/9฿34,136

Thu 12/1107:10 -

2 stops27h 20m

Mon 16/1115:30 -

3 stops32h 00m

Deal found 11/9฿34,169

Thu 1/1007:00 -

2 stops25h 05m

Sun 18/1009:30 -

2 stops32h 05m

Deal found 11/9฿34,202

Wed 4/1107:10 -

2 stops27h 20m

Wed 31/315:30 -

3 stops31h 05m

Deal found 10/9฿34,235

Mon 9/1108:25 -

2 stops39h 54m

Sun 22/1120:45 -

2 stops45h 45m

Deal found 11/9฿35,689

Sun 11/1015:45 -

3 stops29h 59m

Sun 18/1008:30 -

2 stops33h 05m

Deal found 11/9฿35,822

Tue 3/1108:25 -

2 stops39h 54m

Mon 29/320:45 -

2 stops39h 50m

Deal found 10/9฿36,086

Wed 4/1100:20 -

2 stops23h 06m

Mon 9/1106:00 -

2 stops28h 45m

Deal found 11/9฿52,080

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Thu 12/1107:10 -

2 stops27h 20m

Mon 16/1115:30 -

3 stops32h 00m

Deal found 11/9฿34,169

Mon 19/1009:35 -

2 stops45h 33m

Sun 25/1009:30 -

2 stops32h 40m

Deal found 7/9฿40,745

Sun 11/1021:40 -

2 stops26h 18m

Sun 18/1009:00 -

2 stops27h 35m

Deal found 11/9฿41,737

Fri 15/111:50 -

2 stops44h 10m

Wed 5/509:30 -

2 stops37h 55m

Deal found 8/9฿42,034

Wed 4/1100:20 -

2 stops23h 06m

Mon 9/1106:00 -

2 stops28h 45m

Deal found 11/9฿52,080

Sun 11/1015:45 -

3 stops29h 59m

Sun 18/1008:30 -

2 stops33h 05m

Deal found 11/9฿35,822

Sat 16/109:10 -

2 stops23h 55m

Mon 10/513:00 -

2 stops28h 35m

Deal found 9/9฿38,531

Thu 14/111:50 -

2 stops42h 09m

Wed 5/509:30 -

2 stops37h 55m

Deal found 8/9฿42,629

Thu 24/1209:50 -

2 stops25h 39m

Sat 2/106:00 -

2 stops29h 05m

Deal found 8/9฿44,017

Sat 16/111:50 -

2 stops42h 09m

Thu 6/509:30 -

2 stops37h 55m

Deal found 8/9฿42,629

Fri 23/1002:35 -

2 stops29h 04m

Sat 31/1006:10 -

2 stops29h 55m

Deal found 9/9฿45,504

Sat 16/111:50 -

2 stops42h 09m

Wed 5/509:30 -

2 stops37h 55m

Deal found 8/9฿42,629

Wed 13/111:25 -

2 stops44h 35m

Wed 12/509:30 -

2 stops37h 50m

Deal found 9/9฿42,761

Thu 14/111:50 -

2 stops42h 09m

Tue 11/509:30 -

2 stops61h 55m

Deal found 9/9฿43,356

Mon 11/121:40 -

2 stops27h 04m

Wed 5/508:00 -

2 stops26h 45m

Deal found 8/9฿53,402

Thu 14/111:50 -

2 stops42h 09m

Wed 12/518:59 -

2 stops28h 26m

Deal found 9/9฿43,918

Sat 16/109:50 -

2 stops25h 28m

Fri 7/508:00 -

2 stops26h 45m

Deal found 8/9฿54,658

Wed 13/117:00 -

2 stops39h 00m

Tue 11/509:30 -

2 stops43h 50m

Deal found 9/9฿47,652

Wed 13/111:50 -

2 stops44h 10m

Fri 14/518:59 -

2 stops28h 26m

Deal found 9/9฿47,751

Sun 10/111:25 -

2 stops40h 38m

Fri 14/518:59 -

2 stops28h 21m

Deal found 10/9฿48,478

Thu 7/111:50 -

2 stops44h 10m

Fri 14/518:59 -

2 stops28h 26m

Deal found 10/9฿50,890

Find flight deals from Thailand to Reagan-National

Round-trip from	฿34,136
One-way from	฿18,373
Popular in	April
Cheapest in	October
Average price	฿38,069

United Airlines
9/11-22/11
5 total stops
57h 20m total
Thailand to Washington, D.C.

Search Deals

26/10-31/12
3 total stops
33h 55m total
Thailand to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (฿261,466 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (฿69,553 potential savings vs. average return price).

Search Deals

Average for round-trip flights in September 2026

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Fastest return journey

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Fri 22/1

10:55-23:45

3 stops24h 50m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿23,297

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Wed 23/9

17:30-20:00

2 stops37h 30m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿23,826

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Fri 23/10

07:05-21:50

2 stops25h 45m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,388

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Wed 13/1

08:05-20:00

3 stops47h 55m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,916

BangkokWashington, D.C.

BKK Bangkok Suvarnabhumi - DCA Washington, D.C. Reagan-National

BKKDCA

Bangkok Suvarnabhumi

Wed 16/12

07:55-21:59

2 stops26h 04m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿25,148

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Tue 6/10

23:00-10:20

2 stops46h 20m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿25,478

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Mon 5/10

23:00-22:34

2 stops34h 34m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿25,809

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Fri 15/1

07:05-20:00

3 stops48h 55m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿26,437

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Thu 14/1

11:25-17:59

2 stops42h 34m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿27,263

Chiang MaiWashington, D.C.

CNX Chiang Mai - DCA Washington, D.C. Reagan-National

CNXDCA

Chiang Mai

Tue 12/1

22:30-21:59

3 stops35h 29m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿27,362

Flights are sorted by cheapest return flights first.

Deals found on 11/9

Showing 1-10 of 39 resultsSorted by cheapest first

Best time to book a flight from Thailand to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Thailand with our price prediction graph.

BKK-DCA

CNX-DCA

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Thailand to Washington, D.C. Reagan-National Airport

TH0-DCA

BKK-DCA

CNX-DCA

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?
United Airlines can get you from Thailand to Washington, D.C. Reagan-National Airport in just under 27h 20m. Your travel time can differ by up to . The distance between Thailand and Washington, D.C. Reagan-National Airport is about 14157 km.
Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?
Yes. In addition to deals on Thailand to Reagan-National flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Thailand to Reagan-National?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Thailand to Reagan-National.
Can I find deals for business class flights from Thailand to Reagan-National?
Yes. Cheapflights offers flight deals from Thailand to Reagan-National by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes

Complete your trip

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Alternative routes for Thailand to Reagan-National

Chiang Mai to Dulles Intl flights

Chiang Mai to Reagan-National flights

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Thailand to Reagan-National. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Thailand to Reagan-National?

Cheapflights helps you find that perfect flight to Reagan-National from Thailand by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Thailand to Reagan-National with no change fees?

Yes! Cheapflights helps users easily find flights from Thailand to Reagan-National with no change fees.

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Cheap flights from Thailand to Washington, D.C. Reagan-National Airport from ฿18,373

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/10. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Thailand to Reagan-National

Cheapest flights from Thailand to Reagan-NationalExplore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Best flights from Thailand to Reagan-NationalDiscover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Last-minute flights from Thailand to Reagan-NationalDiscover last-minute flight deals from Thailand to Reagan-National. Data last updated 12 September 2026 and is based on user searches.

Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 12 September 2026 and is based on user searches.

One-way flights from Thailand to Reagan-NationalSearch for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.

Find flight deals from Thailand to Reagan-National

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Use the filters below to find and compare flights from Thailand to Washington, D.C. Reagan-National Airport that are best for you.

Best time to book a flight from Thailand to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National from Thailand with our price prediction graph.

Cheapflights Insights

Related info for your journey

How long is the flight from Thailand to Washington, D.C. Reagan-National Airport?

Can I find deals for flights from Thailand to Reagan-National that include hotel bookings?

How can I find direct flights from Thailand to Reagan-National?

Can I find deals for business class flights from Thailand to Reagan-National?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Thailand to Reagan-National

See prices for flight routes from nearby airports that may be better suited for you.

Complete your trip

Complete your trip to Reagan-National by adding a car rental and/or hotel reservation to your travel itinerary.

Search flights from Thailand to Reagan-National by cabin class

Find flights from Thailand to Reagan-National, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Thailand and Reagan-National flights

Browse other Thailand and Reagan-National flight options. Last updated on 12 September 2026.

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Cheapest flights from Thailand to Reagan-National
Explore the most affordable flight options available from Thailand to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 September 2026.

Best flights from Thailand to Reagan-National
Discover carefully curated flight deals from Thailand to Reagan-National that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 12 September 2026.

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 12 September 2026 and is based on user searches.

One-way flights from Thailand to Reagan-National
Search for one-way flight options from Thailand to Reagan-National. Find affordable one-way fares based on user searches. Data last updated 12 September 2026.