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IDA to STL: distance & flight time
Idaho Falls (Idaho Falls Regional Airport) → St. Louis (St Louis Lambert International Airport)
1,173 mi
1,887 km · 1,019 nm
3h 1m
estimated nonstop flight time
+1h
time difference · heading east
See live IDA→STL fares Phone-only fares on this route — call free
Flight time details
1,173 miles nonstop takes roughly 3h 1m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- IDA — Idaho Falls Regional Airport · Idaho Falls, United States
- STL — St Louis Lambert International Airport · St. Louis, 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 IDA
- PIH · Pocatello Regional Airport49 mi away
- JAC · Jackson Hole Airport67 mi away
- WYS · Yellowstone Airport94 mi away
- BYI · Burley Municipal Airport109 mi away
Near STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Frequently asked questions
How far is IDA from STL?
The flight distance from Idaho Falls (IDA) to St. Louis (STL) is 1,173 miles (1,887 km, 1,019 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IDA to STL?
A nonstop flight takes about 3h 1m 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 IDA to STL?
Nonstop service on IDA–STL 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 3h 1m nonstop estimate.
What is the time difference between Idaho Falls and St. Louis?
St. Louis is 1 hour ahead of Idaho Falls.
What is the cheapest way to fly from IDA to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IDA–STL that never appear on search engines, with no booking fees.
Why are some IDA to STL fares phone-only?
Consolidator contracts let us sell certain IDA–STL 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.