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.

฿18,320+ 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 15 September 2026.

Thu 12/1107:10 -

2 stops27h 20m

Mon 16/1115:30 -

3 stops32h 00m

Deal found 14/9฿34,251

Mon 9/1109:10 -

2 stops25h 20m

Sun 22/1115:30 -

3 stops32h 00m

Deal found 11/9฿34,284

Thu 1/1007:00 -

2 stops25h 05m

Sun 18/1009:30 -

2 stops32h 05m

Deal found 11/9฿34,351

Mon 2/1109:10 -

2 stops25h 20m

Thu 5/1108:30 -

2 stops27h 50m

Deal found 12/9฿34,384

Fri 30/1007:10 -

2 stops26h 20m

Mon 2/1114:08 -

3 stops33h 22m

Deal found 14/9฿35,811

Mon 9/1108:25 -

2 stops39h 54m

Sun 22/1120:45 -

2 stops45h 45m

Deal found 11/9฿35,844

Sun 11/1015:45 -

3 stops29h 59m

Sun 18/1008:30 -

2 stops33h 05m

Deal found 11/9฿35,977

Tue 3/1108:25 -

2 stops39h 54m

Mon 29/320:45 -

2 stops39h 50m

Deal found 10/9฿36,242

Sun 1/1100:20 -

2 stops30h 17m

Thu 5/1119:40 -

2 stops39h 05m

Deal found 12/9฿38,333

Wed 28/1000:20 -

2 stops33h 47m

Thu 5/1120:50 -

2 stops37h 55m

Deal found 13/9฿38,433

Sat 31/1000:20 -

2 stops26h 37m

Sun 15/1106:00 -

2 stops28h 45m

Deal found 14/9฿41,951

Sat 31/1000:20 -

2 stops31h 23m

Sat 21/1106:00 -

2 stops28h 45m

Deal found 14/9฿49,385

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 15 September 2026.

Thu 12/1107:10 -

2 stops27h 20m

Mon 16/1115:30 -

3 stops32h 00m

Deal found 14/9฿34,251

Mon 2/1100:20 -

2 stops34h 47m

Thu 5/1119:40 -

2 stops39h 05m

Deal found 12/9฿38,333

Thu 7/111:15 -

2 stops47h 34m

Mon 17/513:56 -

2 stops38h 49m

Deal found 12/9฿48,655

Sun 10/111:25 -

2 stops40h 38m

Fri 14/518:59 -

2 stops28h 21m

Deal found 10/9฿48,688

Wed 4/1100:20 -

2 stops23h 06m

Mon 9/1106:00 -

2 stops28h 45m

Deal found 14/9฿52,140

Sun 11/1015:45 -

3 stops29h 59m

Sun 18/1008:30 -

2 stops33h 05m

Deal found 11/9฿35,977

Wed 28/1009:50 -

2 stops24h 57m

Wed 4/1107:45 -

2 stops27h 20m

Deal found 13/9฿38,433

Wed 28/1000:20 -

2 stops33h 47m

Thu 5/1120:50 -

2 stops37h 55m

Deal found 13/9฿38,433

Fri 11/1216:55 -

3 stops33h 07m

Sat 2/117:53 -

2 stops29h 37m

Deal found 13/9฿43,411

Tue 12/108:00 -

2 stops50h 49m

Sat 15/513:56 -

2 stops38h 49m

Deal found 12/9฿48,655

Sun 11/1021:40 -

2 stops26h 18m

Sun 18/1009:00 -

2 stops27h 35m

Deal found 11/9฿41,918

Sat 9/111:50 -

2 stops44h 10m

Fri 14/518:59 -

2 stops28h 26m

Deal found 10/9฿51,111

Thu 7/111:15 -

2 stops47h 34m

Wed 12/517:22 -

2 stops35h 23m

Deal found 12/9฿48,655

Sat 12/1216:55 -

3 stops31h 54m

Fri 1/113:00 -

3 stops34h 30m

Deal found 13/9฿45,801

Sat 12/1221:40 -

2 stops27h 18m

Fri 1/107:20 -

2 stops27h 45m

Deal found 13/9฿41,951

Thu 7/111:50 -

2 stops44h 10m

Fri 14/518:59 -

2 stops28h 26m

Deal found 10/9฿51,111

Sat 31/1000:20 -

2 stops26h 37m

Sun 15/1106:00 -

2 stops28h 45m

Deal found 14/9฿41,951

Sun 10/111:50 -

2 stops42h 09m

Thu 13/509:30 -

2 stops61h 55m

Deal found 10/9฿52,040

Thu 7/111:50 -

2 stops44h 10m

Sat 15/509:30 -

2 stops37h 55m

Deal found 10/9฿53,235

Sat 31/1000:20 -

2 stops31h 23m

Sat 21/1106:00 -

2 stops28h 45m

Deal found 14/9฿49,385

Find flight deals from Thailand to Reagan-National

Round-trip from	฿34,251
One-way from	฿18,752
Popular in	April
Cheapest in	October
Average price	฿38,234

United Airlines
12/11-16/11
5 total stops
59h 20m total
Thailand to Washington, D.C.

Search Deals

12/11-31/12
3 total stops
51h 37m total
Thailand to Washington, D.C.

Search Deals

Highest demand for flights based on searches. 16% potential increase in price (฿263,425 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (฿70,125 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

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Fri 6/11

09:50-16:20

2 stops42h 30m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿20,743

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Tue 15/12

12:15-20:00

2 stops43h 45m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,772

Chiang MaiWashington, D.C.

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

CNXDCA

Chiang Mai

Thu 12/11

00:20-21:50

3 stops33h 30m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿21,971

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Wed 23/12

17:50-17:56

2 stops36h 06m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,004

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Thu 24/12

17:50-16:06

2 stops34h 16m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿22,203

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

฿23,398

Chiang MaiWashington, D.C.

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

CNXDCA

Chiang Mai

Mon 7/12

22:30-20:00

3 stops57h 30m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿23,498

Chiang MaiWashington, D.C.

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

CNXDCA

Chiang Mai

Fri 19/2

11:25-20:00

2 stops44h 35m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿23,730

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

฿23,929

BangkokWashington, D.C.

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

BKKDCA

Bangkok Suvarnabhumi

Thu 28/1

09:50-16:03

2 stops42h 13m

Washington, D.C. Reagan-National

Wed 31/12

00:00-12:00

Nonstop0h 00m

฿24,759

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Showing 1-10 of 42 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 and เดลต้า 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 7h 27m. The distance between Thailand and Washington, D.C. Reagan-National Airport is about 14157 km. Both multi-stop and direct flights can be found to your destination and back.
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

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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?

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Can Cheapflights 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 ฿18,320

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/11. 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 15 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 15 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 15 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 15 September 2026.

Last-minute flights from Thailand to Reagan-NationalDiscover last-minute flight deals from Thailand to Reagan-National. Data last updated 15 September 2026 and is based on user searches.

Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 15 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 15 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 15 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

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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 15 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 15 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 15 September 2026.

Last-minute flights from Thailand to Reagan-National
Discover last-minute flight deals from Thailand to Reagan-National. Data last updated 15 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 15 September 2026.