Seattle is the quickest US gateway seen to Phnom Penh: 19h 15m via Seoul, on Delta and Korean Air. Singapore Airlines had the cheapest round trip seen, $584, but with a 33-hour journey. You land at Techo, about 20 km south of the city.
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fare checked October 12, 2026; it changes with your dates
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From Sea-Tac, Seoul and Taipei are the short way across the Pacific. The Gulf carriers fly too, but the trip is much longer.
Connecting in the Gulf? Check your flight close to departure. Europe's aviation safety agency advises its airlines to avoid parts of Gulf airspace until at least November 16, 2026. Emirates, Qatar Airways and Etihad keep flying through their hubs, but schedules can change at short notice.
Delta or Korean Air, then Korean Air
Seoul Incheon: 11 Korean Air flights a week from Seattle, then a daily nonstop. 19h 15m, the fastest seen
Right for you if you want the shortest trip.
See flights on Aviasales Affiliate linkEVA Air
Taipei: 10 Seattle flights a week, then a daily nonstop to Phnom Penh
Right for you if you want a full-service Asian airline on both legs.
See flights on Aviasales Affiliate linkSingapore Airlines
Singapore: 5 Seattle flights a week, then 3 flights a day to Phnom Penh. ≈ 32h 55m on the cheapest fare
Right for you if the price matters more than the time: $584 round trip seen in January.
See flights on Aviasales Affiliate linkCathay Pacific
Hong Kong: 5 Seattle flights a week, then 2 nonstops a day to Phnom Penh
Right for you if your dates line up with Cathay's five weekly flights.
See flights on Aviasales Affiliate linkQatar Airways
Doha: a daily Seattle flight, then the daily Phnom Penh flight, which stops in Ho Chi Minh City
Right for you if you already fly Qatar Airways.
See flights on Aviasales Affiliate linkVia Seoul, the fastest seen
19h 15m
Singapore Airlines, cheapest fare seen
32h 55m
One-way flying time, connection included. Source: Kayak, October 12, 2026.
Techo replaced the old airport, which was in town. It's farther out: factor the transfer into your arrival plans.
1,500 riel
The Phnom Penh city bus line, 5:30 a.m. to 11:30 p.m., makes 4 stops as far as the train station. Cash, riel only; 1 to 2 hours depending on traffic.
$10 to $20
Desks in the arrivals hall, or Grab, PassApp and WowNow. The fare depends on the neighborhood. Allow 45 minutes to 1.5 hours for about 20 km.
from about $15
On 12Go, a private sedan can be booked ahead from about $15, an SUV for around $40. Handy for a night arrival or with family.
Phnom Penh is worth a few days. From there, the river leads south to the delta and its pagodas, and north toward Laos.
Photo by Bùi Thụy Đào Nguyên on Wikimedia Commons · CC BY-SA 3.0
Photo by Christophe95 on Wikimedia Commons · CC BY-SA 4.0
Photo by allPhoto Bangkok on Unsplash
Sources: routes, times and fares seen, Kayak and Google Flights (October 12, 2026); flights to Techo, AeroRoutes (2025-2026) and EVA Air (August 2025); Gulf airspace, EASA CZIB-2026-07R3 (September 30, 2026); transfers, Techo International Airport, Nomad Lawyer and GeckoRoutes (2026), 12Go (checked October 11, 2026); e-Visa, Mekong Tourism (January 2025) and the US State Department. Updated October 12, 2026 by Pierre-Marie Coupry.