AirHint found the following cheapest return flights from Washington (IAD) to Hanoi (HAN) in March 2026 (see full year).

Return flights

02 Mar - 15 Mar	Frontier Airlines
10 Mar - 20 Mar	Frontier Airlines
11 Mar - 20 Mar	Frontier Airlines
06 Mar - 13 Mar	Qatar Airways
25 Mar - 05 Apr	Frontier Airlines
06 Mar - 14 Mar	Delta
06 Mar - 21 Mar	Delta
06 Mar - 22 Mar	Delta
05 Mar - 20 Mar	Delta
13 Mar - 14 Mar	Korean Air

Also check the deals for one-way flights from Washington to Hanoi in March.

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

Book a cheap hotel in Hanoi

Cheap car rent in Hanoi

Cheapest return flights from Washington to Hanoi in March from $1001

Return flights