In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

What is the cheapest time of day to fly from LWS to IAD?

When flying from Lewiston, Idaho to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Most accurate provider : When it comes to deals on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.

Most trusted provider : When it comes to deals on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

What airport do you fly from for flights from Lewiston to Washington, D.C. Dulles Intl?

If you book a flight to Washington, D.C. Dulles Intl from Lewiston, you will be flying from Nez Perce Rgnl, which is the city’s only airport. Lewiston Nez Perce Rgnl (LWS) is located 1.9 mi from the center of Lewiston. There are 0 flights from Nez Perce Rgnl to Washington, D.C. Dulles Intl per day from 0 different airlines.

Can I find deals for flights from Lewiston to Dulles Intl that include hotel bookings?

Yes. In addition to deals on Lewiston to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Lewiston to Dulles Intl?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Lewiston to Dulles Intl.

Can I find deals for business class flights from Lewiston to Dulles Intl?

Yes. Cheapflights offers flight deals from Lewiston to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$1,243+ Cheap Flights from Lewiston, ID to Washington, D.C. Dulles Intl Airport

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Cheapest flights from Lewiston to Dulles Intl
Explore the most affordable flight options available from Lewiston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Thu 10/812:19 pm -

1 stop8h 16m

Fri 10/96:13 am -

1 stop8h 26m

Deal found 9/15

$1,243

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LewistonWashington, D.C.

LWS Lewiston Nez Perce Rgnl - IAD Washington, D.C. Dulles Intl

LWSIAD

Lewiston Nez Perce Rgnl

Thu 10/8

12:19 pm-12:42 am

2 stops9h 23m

Washington, D.C. Dulles Intl

Fri 10/9

6:13 am-11:39 am

1 stop8h 26m

$1,317

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Most accurate provider: When it comes to deals on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight searches over the past month and is updated monthly.
Most trusted provider: When it comes to deals on Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Lewiston, Idaho-Washington, D.C. Dulles Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Lewiston to Dulles Intl

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LWS-IAD

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Related info for your journey

What airport do you fly from for flights from Lewiston to Washington, D.C. Dulles Intl?
If you book a flight to Washington, D.C. Dulles Intl from Lewiston, you will be flying from Nez Perce Rgnl, which is the city’s only airport. Lewiston Nez Perce Rgnl (LWS) is located 1.9 mi from the center of Lewiston. There are 0 flights from Nez Perce Rgnl to Washington, D.C. Dulles Intl per day from 0 different airlines.
Can I find deals for flights from Lewiston to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Lewiston to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Lewiston to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Lewiston to Dulles Intl.
Can I find deals for business class flights from Lewiston to Dulles Intl?
Yes. Cheapflights offers flight deals from Lewiston to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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$1,243+ Cheap flights from Lewiston, ID (LWS) to Dulles Intl (IAD)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/8. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheapest flights from Lewiston to Dulles IntlExplore the most affordable flight options available from Lewiston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Explore the most affordable flight options available from Lewiston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Best flights from Lewiston to Dulles IntlDiscover carefully curated flight deals from Lewiston to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Discover carefully curated flight deals from Lewiston to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Last-minute flights from Lewiston to Dulles IntlDiscover last-minute flight deals from Lewiston to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

Discover last-minute flight deals from Lewiston to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.

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Use the filters below to find and compare flights from Lewiston to Washington, D.C. Dulles Intl Airport that are best for you.

Best time to book a flight from Lewiston to Dulles Intl

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Related info for your journey

What airport do you fly from for flights from Lewiston to Washington, D.C. Dulles Intl?

Can I find deals for flights from Lewiston to Dulles Intl that include hotel bookings?

How can I find direct flights from Lewiston to Dulles Intl?

Can I find deals for business class flights from Lewiston to Dulles Intl?

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Cheapest flights from Lewiston to Dulles Intl
Explore the most affordable flight options available from Lewiston to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2026.

Best flights from Lewiston to Dulles Intl
Discover carefully curated flight deals from Lewiston to Dulles Intl that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2026.

Last-minute flights from Lewiston to Dulles Intl
Discover last-minute flight deals from Lewiston to Dulles Intl. Data last updated September 15, 2026 and is based on user searches.