Houston (IAH) to Ho Chi Minh City (SGN): 9,261 miles (14,904 km) great-circle, about 19h 00m nonstop by our estimate. Cheapest fare observed: $1398 round-trip on Frontier, with 2 stops, departing June 2, 2026.
$1398 round-trip, Frontier F93136, departing 2026-06-02 at 20:12, returning 2026-07-08. The recorded itinerary left on a Tuesday, returning on a Wednesday 36 nights later; the fare was observed 38 days before departure. "Book this flight" opens Kiwi.com with the same airline and dates.
At $1398, it ranked 27th of the 30 round-trip fares we recorded from IAH (median $247). That is 15.1 cents per great-circle mile (round-trip price over one-way distance), below the IAH median of 17.9 cents across 30 round-trip routes.
Routes from IAH of similar length: Hyderabad (9,148 mi) at $1105 and Almaty (7,347 mi) at $1585.
Frontier had the cheapest fare on 12 of 30 IAH routes. It is the longest of the 30 routes we track from IAH.
Of 20 departure airports with a fare to Ho Chi Minh City, Houston (IAH) ranked 18th at $1398. Lowest: $183 from Bangkok (BKK); highest: $1566 from Salt Lake City (SLC); 8 nonstop. Cheapest-fare airlines (routes): VietJet Air (3), Air India (2), American Airlines (2), Qatar (2), AirAsia (1) and Cathay Pacific (1), plus 9 more.
Travelpayouts fares (cheapest per route, observed April 25, 2026); OurAirports coordinates and elevations; IANA zones America/Chicago, Asia/Ho_Chi_Minh; flight time is our estimate.