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THR to DCA: distance & flight time
Teheran (Mehrabad International Airport) → Washington (Ronald Reagan Washington National Airport)
6,323 mi
10,176 km · 5,495 nm
12h 52m
estimated nonstop flight time
-7.5h
time difference · heading northwest
See live THR→DCA fares Phone-only fares on this route — call free
Flight time details
6,323 miles nonstop takes roughly 12h 52m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7.5-hour time set-back when reading arrival times on your ticket.
The two airports
- THR — Mehrabad International Airport · Teheran, Iran
- DCA — Ronald Reagan Washington National Airport · Washington, 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 DCA
Frequently asked questions
How far is THR from DCA?
The flight distance from Teheran (THR) to Washington (DCA) is 6,323 miles (10,176 km, 5,495 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from THR to DCA?
A nonstop flight takes about 12h 52m 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 Washington?
Washington is 7.5 hours behind Teheran.
What is the cheapest way to fly from THR to DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on THR–DCA that never appear on search engines, with no booking fees.