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IAD to SMN: distance & flight time
Washington (Washington Dulles International Airport) → Salmon (Lemhi County Airport)
1,900 mi
3,058 km · 1,651 nm
4h 12m
estimated nonstop flight time
-2h
time difference · heading northwest
See live IAD→SMN fares Phone-only fares on this route — call free
Flight time details
1,900 miles nonstop takes roughly 4h 12m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time set-back when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- SMN — Lemhi County Airport · Salmon, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near IAD
Near SMN
- BTM · Bert Mooney Airport88 mi away
- MYL · McCall Municipal Airport110 mi away
- SUN · Friedman Memorial Airport114 mi away
- MSO · Missoula International Airport124 mi away
Frequently asked questions
How far is IAD from SMN?
The flight distance from Washington (IAD) to Salmon (SMN) is 1,900 miles (3,058 km, 1,651 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to SMN?
A nonstop flight takes about 4h 12m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from IAD to SMN?
Nonstop service on IAD–SMN depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 4h 12m nonstop estimate.
What is the time difference between Washington and Salmon?
Salmon is 2 hours behind Washington.
What is the cheapest way to fly from IAD to SMN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–SMN that never appear on search engines, with no booking fees.
Why are some IAD to SMN fares phone-only?
Consolidator contracts let us sell certain IAD–SMN tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.