Cheap Flights from Washington D.C. to Idaho from $384 Return

Flight deals from Washington D.C. to Idaho

Looking for cheap tickets from Washington D.C. to Idaho, or a last-minute trip? Find the lowest prices on one-way and return tickets right here.

Boise.$142 per passenger.Departing Wed, 11 Feb.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Ronald Reagan on Wed, 11 Feb, arriving in Boise.Price includes taxes and charges.From $142, select.

Idaho Falls.$295 per passenger.Departing Tue, 5 May.One-way flight with United.Outbound indirect flight with United, departs from Washington Dulles on Tue, 5 May, arriving in Idaho Falls.Price includes taxes and charges.From $295, select.

Twin Falls.$601 per passenger.Departing Tue, 21 Apr.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Ronald Reagan on Tue, 21 Apr, arriving in Twin Falls.Price includes taxes and charges.From $601, select.

Lewiston.$615 per passenger.Departing Tue, 7 Apr.One-way flight with Delta.Outbound indirect flight with Delta, departs from Washington Dulles on Tue, 7 Apr, arriving in Lewiston-Nez Perce County.Price includes taxes and charges.From $615, select.

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Flying from Washington D.C. to Idaho

Arm yourself with these facts on the fly.

Cheapest flight found	$142
Cheapest month to fly	February
Cheapest airport to fly from	Washington Ronald Reagan

How to find cheap flights from Washington D.C. to Idaho

We've compared the best online travel agents and flight providers on the internet to find the cheapest plane tickets from Washington D.C. to Idaho. Other savvy travellers recently found return flights from $384 and one-way tickets from $142 one-way. Ready to join them? Here are a few tips to help you do it the smart way.

Fly from Baltimore Washington International into Boise

At the moment, the lowest priced flight tickets to Idaho are from Baltimore Washington International Airport to Boise Airport.

Fly in February

We crunched the flight calendar and found the cheapest time to fly from Washington D.C. to Idaho is currently February.

Flex your dates for the best rates

If you’re flexible on your departure dates, you can use Skyscanner's whole month tool to find the cheapest day of the year to fly from Washington D.C. to anywhere you choose in Idaho.

Watch as fares rise and fall

With Price Alerts, we'll let you know when flight prices from Washington D.C. to Idaho go up or down so you can book when the time is just right.

Relax – these are fee-free flight tickets

With us, there are no added fees – the Idaho to Idaho flight price you see when you search with us is what you pay to the provider.

Frequently asked questions

What's the average Washington D.C. to Idaho flight price?

We looked at all of the upcoming return flights from Washington D.C. to Idaho we could find over the next 12 months. It looks like $384 is the best price. This is good, compared to the average Idaho ticket price of $641.

What is the cheapest month to fly from Washington D.C. to Idaho?

The cheapest month to fly from Washington D.C. to Lewiston-Nez Perce County Airport is usually February. The cheapest month to fly from Washington D.C. to Idaho Falls Airport is usually March. The cheapest month to fly from Washington D.C. to Boise Airport is usually February. And the cheapest month to fly from Washington D.C. to Hailey Airport is usually January.

Which upcoming date is cheapest to fly from Washington D.C. to Idaho on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Washington D.C. to Idaho on Saturday, 21 February 2026.

Are there any direct flights from Washington D.C. to Idaho?

Currently, there aren't any direct flights from Washington D.C. to Idaho, but you can still fly with a stopover.

If I'm flying from Washington D.C., where in Idaho is cheapest to fly into?

If you're flying from Washington D.C., the cheapest city in Idaho to fly into is Boise. The cheapest airport serving Boise at the moment is Boise.

Flights from Washington D.C. to Idaho