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STL to DEF: distance & flight time
St. Louis (St Louis Lambert International Airport) → Dezful (Dezful Airport)
6,852 mi
11,027 km · 5,954 nm
13h 54m
estimated nonstop flight time
+8.5h
time difference · heading northeast
See live STL→DEF fares Phone-only fares on this route — call free
Flight time details
6,852 miles nonstop takes roughly 13h 54m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8.5-hour time gain when reading arrival times on your ticket.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- DEF — Dezful Airport · Dezful, Iran
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 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
Near DEF
- KHD · Khoram Abad Airport69 mi away
- AWZ · Ahwaz Airport79 mi away
- OMI · Omidiyeh Airport129 mi away
- MRX · Mahshahr Airport137 mi away
Frequently asked questions
How far is STL from DEF?
The flight distance from St. Louis (STL) to Dezful (DEF) is 6,852 miles (11,027 km, 5,954 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to DEF?
A nonstop flight takes about 13h 54m 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 STL to DEF?
Nonstop service on STL–DEF 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 13h 54m nonstop estimate.
What is the time difference between St. Louis and Dezful?
Dezful is 8.5 hours ahead of St. Louis.
What is the cheapest way to fly from STL to DEF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–DEF that never appear on search engines, with no booking fees.
Why are some STL to DEF fares phone-only?
Consolidator contracts let us sell certain STL–DEF 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.