What is the cheapest month to fly from Billings to Dulles?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Billings (BIL) to Dulles (IAD), with fares starting from $239.

What is the lowest current fare from BIL to IAD?

The lowest currently-listed fare from Billings (BIL) to Dulles (IAD) is $239 on 2026-05-28.

Is there a direct flight from Billings to Dulles?

There is currently no non-stop service from BIL to IAD. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Billings to Dulles

Cheapest current fares: $239 in May 2026 on connecting flights.

Last updated May 25, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Billings (BIL) to Dulles (IAD). Refreshed daily.

Billings (BIL) → Dulles (IAD)

May 2026 $239
June 2026 $263

Frequently asked questions

What is the cheapest month to fly from Billings to Dulles?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Billings (BIL) to Dulles (IAD), with fares starting from $239.
What is the lowest current fare from BIL to IAD?

The lowest currently-listed fare from Billings (BIL) to Dulles (IAD) is $239 on 2026-05-28.
Is there a direct flight from Billings to Dulles?

There is currently no non-stop service from BIL to IAD. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.