Distance From Allen Army Airfield to Mehrabad International Airport, BIG - THR Distance

The distance from Allen Army Airfield (BIG) to Mehrabad International Airport (THR) is 5487 miles or 8830 kilometers or 4765 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Delta Junction Ft Greely ( United States ) to Tehran ( Iran )?

A one-way nonstop (direct) flight between Delta Junction Ft Greely and Tehran takes around 12 hours 36 minutes.

Estimated flight time from Allen Army Airfield, Delta Junction Ft Greely, United States to Mehrabad International Airport, Tehran, Iran is 12 hours 36 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • BIG - THR

Kilometers		8830 km
Statute Miles		5487 miles
Nautical Miles		4765 nm
Avg. Time of Flight		12 hours 36 minutes

Allen Army Airfield to Mehrabad International Airport Flight Route Map - BIG to THR Flight Path

Location of Allen Army Airfield & Mehrabad International Airport is given below.
Click the map to view Delta Junction Ft Greely to Tehran nonstop flight path and travel direction.

Click to see flight route on Google Map between Delta Junction Ft Greely, United States and Tehran, Iran. .

Nonstop flight route between Delta Junction Ft Greely, United States and Tehran, Iran.

Time Difference Between the Airports • BIG - THR

Time difference between Delta Junction Ft Greely (United States) and Tehran (Iran) is 11 Hours 30 Minutes.
Tehran time is 11 Hours 30 Minutes ahead of Delta Junction Ft Greely.

Location	Local Time
Delta Junction Ft Greely (United States)	2026-03-18, 21:34:41 AKDT
Tehran (Iran)	2026-03-19, 09:04:41 +0330

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Allen Army Airfield (BIG / PABI) Delta Junction Ft Greely, United States

Destination

Mehrabad International Airport (THR / OIII) Tehran, Iran