BOI to WAS, Boise Airport to Cheap Flights

Based on HopeGoo data, Frontier Airlines offers one-way fares as low as US$116 on Cheapest nonstop routes (e.g. BOI to DCA on Fri, Feb 27), while Delta Air Lines offers Cheapest nonstop round-trips from US$222 departing on Tue, Mar 31 and returning on Wed, Apr 8.

At the moment, several airlines serve connecting flights from Boise to Washington D.C., including: United Airlines Selected airlines are based on historical data collected from flight bookings made by users on HopeGoo within the last 90 days.

By analyzing data from all airlines on the HopeGoo flight calendar, it looks like the best time to book a flight from Boise to Washington D.C. is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

To find best deals on flights from Boise to Washington D.C., you can use various tools on HopeGoo: · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Fri, Feb 27, with one-way flights priced at just US$116. · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines. · Set up price alerts to easily monitor ticket prices without having to check every day. · Check HopeGoo flight deals and promo codes frequently. · Avoid peak season unless you book very early. It seems the peak season for Washington D.C. travel is around July. · Get exclusive promo codes for HopeGoo app users.

The cheapest months to fly from Boise to Washington D.C. is September, when demand for travel is lower.

After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Boise to Washington D.C. on February 27, 2026 with Frontier Airlines, with prices starting at US$116.

You can land at any one of the following hubs in Washington D.C., with Boise Airport to Dulles International Airport (BOI-IAD) is by far the most common option on this route: Ronald Reagan Washington National Airport (DCA) Dulles International Airport (IAD).

The time difference between Washington D.C. and Boise is 2h.

Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your HopeGoo, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.