$522 Find Cheap Flights from St. Louis to Phnom Penh - Compare and Save

Flights from St. Louis to Phnom Penh usually depart from Lambert-St Louis (STL) and arrive at Phnom Penh Techo Intl (KTI).

Only Economy Class is available on flights from St. Louis to Phnom Penh.

On the St. Louis to Phnom Penh route, being flexible with your departure day can save you up to 54%. Sunday is the cheapest day at $1,081 round-trip on average, while Saturday is the most expensive at $2,329: a $1,248 difference. Cheaper weekend fares like these are typical of routes dominated by weekday business travel.

Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route varied from about $1,053 to $1,856. That means the highest observed fare was about 76% higher than the lowest one.

One-way fares from St. Louis to Phnom Penh are currently lower than usual. Average one-way flight prices are about $687, which is 28% below the typical average for this route.

Phnom Penh is 12 hours ahead of St. Louis (Indochina Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Round-trip flights from St. Louis to Phnom Penh range from $1,243 to $1,952, with an average of $1,248 over the past 12 months. Anything below $1,243 counts as a good deal.