Rare1 stop · 10.5h
WAS to LIMPeru
Lima
$347
usually $630
−45%
Most monthly lows $409–$630. Cheaper than every other month on record (3).
Flights · WAS → HAN
Washington to Hanoi
Best fare, round trip
$1,125
Too little price history on this route to compare — the fare is shown as found.
Found
- Depart
- Tue 23 Feb
- Return
- Thu 4 Mar
- Stay
- 9 nights
- Flight
- 2 stops · 22.5h
- Airline
United
Cached fare — the booking search re-prices live before you pay.
VietnamHanoiOld-quarter alleys, motorbike tides and the country’s best food — and Ha Long Bay two hours out.Best windowOct–Nov · Mar–AprAirportsNoi Bai (HAN)Every route into HanoiFare seasonality
When this route gets cheap.
The cheapest itinerary we are tracking makes 2 stops and takes about 22.5 hours outbound, on a 9-night trip — ticketed under United, which on a connecting fare need not operate every leg. At $1,125 for 13,345 km each way, that works out to about $42 per 1,000 km flown. That is about the $42 per 1,000 km typical of ultra-long-haul fares here. Across the 13 departure cities we track at a similar distance from Hanoi, this fare ranks 11th — 2.0× the $554 we hold from Madrid. For context, the middle fare among the 28 routes of similar length we watch out of Washington is $887. We have 1 month of cached prices for this route so far — not enough to call a fare cheap or expensive, so we publish the price without a percentage. Fare history here is still too short to name a cheap season. The best time to be in Hanoi: Oct–Nov · Mar–Apr.
We are still collecting this route's months — 1 month of cached prices so far, too few to chart.
Route facts
- Airports
- Dulles (IAD) · Reagan National (DCA) · Baltimore (BWI) ↔ Noi Bai (HAN)
- Flight time
- ≈22.5 hours outbound
- Distance
- ≈13,345 km each way
- Airlines on the board
- United
- Itineraries
- Connections on current fares
- Best months to visit
- Oct–Nov · Mar–Apr
Good to know
WAS → HAN, answered.
How far in advance should I book WAS → Hanoi?
We do not publish a number for this, because we cannot measure it yet. Answering it honestly means watching the same departure date on this route over many weeks as it approaches, and that archive is still filling up — so any "book N days ahead" figure here would be borrowed from somewhere else rather than measured. Our guide Why flight prices change covers the levers we can measure.
Are there nonstop flights from Washington to Hanoi?
The current cheapest fares involve a connection, ticketed under United. We hold no nonstop fare on this route right now, which does not mean none flies — search your exact dates to see what does.
Are these prices guaranteed?
No — these are cached fares found on real searches (this one on 13 October). Airlines reprice constantly, so the booking search re-checks the live price before you pay. Fresher finds are far more likely to still be available.
Next step
Sleeping in Hanoi?
Lock the flight first — then compare stays for 23 Feb '27 – 4 Mar '27 · 9 nights.
Browse hotelsMissed it?
Cached fares expire. This route has a feed of its own — follow it and the next WAS → HAN drop reaches you as soon as we find it.
Follow this route’s feedKeep browsing
Related routes on the board.
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$514
usually $900
−43%
Most monthly lows $625–$956. Cheaper than every other month on record (4).
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$188
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Most monthly lows $275–$320. Cheaper than every other month on record (3).
Rare1 stop · 12h
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$484
usually $885
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$564
usually $895
−37%
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Great1 stop · 15h
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$580
usually $910
−36%
Most monthly lows $580–$937. Other months at or below this: 1 of 5.
