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IAD to SIN: distance & flight time
Washington (Washington Dulles International Airport) → Singapore (Singapore Changi Airport)
9,651 mi
15,532 km · 8,387 nm
19h 23m
estimated nonstop flight time
+12h
time difference · heading north
See live IAD→SIN fares Phone-only fares on this route — call free
Flight time details
9,651 miles nonstop takes roughly 19h 23m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 12-hour time gain when reading arrival times on your ticket.
The two airports
- IAD — Washington Dulles International Airport · Washington, United States
- SIN — Singapore Changi Airport · Singapore, Singapore
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 IAD
Near SIN
- QPG · Paya Lebar Air Base6 mi away
- XSP · Seletar Airport10 mi away
- BTH · Hang Nadim International Airport18 mi away
- TGA · Tengah Air Base20 mi away
Frequently asked questions
How far is IAD from SIN?
The flight distance from Washington (IAD) to Singapore (SIN) is 9,651 miles (15,532 km, 8,387 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAD to SIN?
A nonstop flight takes about 19h 23m 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 Washington and Singapore?
Singapore is 12 hours ahead of Washington.
What is the cheapest way to fly from IAD to SIN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAD–SIN that never appear on search engines, with no booking fees.