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THR to STL: distance & flight time
Teheran (Mehrabad International Airport) → St. Louis (St Louis Lambert International Airport)
6,742 mi
10,850 km · 5,859 nm
13h 41m
estimated nonstop flight time
-8.5h
time difference · heading northwest
See live THR→STL fares Phone-only fares on this route — call free
Flight time details
6,742 miles nonstop takes roughly 13h 41m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8.5-hour time set-back when reading arrival times on your ticket.
The two airports
- THR — Mehrabad International Airport · Teheran, Iran
- 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 THR
- IKA · Imam Khomeini International Airport21 mi away
- PYK · Payam International Airport28 mi away
- NSH · Noshahr Airport68 mi away
- GZW · Qazvin Airport80 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 THR from STL?
The flight distance from Teheran (THR) to St. Louis (STL) is 6,742 miles (10,850 km, 5,859 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THR to STL?
A nonstop flight takes about 13h 41m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Teheran and St. Louis?
St. Louis is 8.5 hours behind Teheran.
What is the cheapest way to fly from THR to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THR–STL that never appear on search engines, with no booking fees.