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Flights from St. Louis to Phnom Penh
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Latest Flight Deals from St. Louis to Phnom Penh

Book one-way or return flights from St. Louis to Phnom Penh from as little as US$891. Choose from the popular airlines below and book your flight today!

  • One way
  • Round-trip
      • STL06:29
        46h 31m
        2 stops
        PNH17:00
        Tue, Jun 25|St. Louis - Phnom Penh|American Airlines
        US$891US$1,764
        49% OFF
        49% OFF
        US$1,764US$891
      • STL06:29
        39h 21m
        2 stops
        PNH09:50
        Fri, Jul 26|St. Louis - Phnom Penh|American Airlines
        US$901US$1,764
        49% OFF
        49% OFF
        US$1,764US$901
      • STL06:06
        28h 4m
        2 stops
        PNH22:10
        Thu, Jun 27|St. Louis - Phnom Penh|Korean Air
        US$1,046US$1,764
        41% OFF
        41% OFF
        US$1,764US$1,046
      • STL06:30
        27h 40m
        2 stops
        PNH22:10
        Thu, Jun 13|St. Louis - Phnom Penh|Delta Air Lines
        US$1,065
        US$1,065
      • STL06:00
        28h 10m
        2 stops
        PNH22:10
        Thu, Jun 27|St. Louis - Phnom Penh|Delta Air Lines
        US$1,065
        US$1,065
      • STL06:06
        28h 4m
        2 stops
        PNH22:10
        Fri, Jun 28|St. Louis - Phnom Penh|Delta Air Lines
        US$1,094
        US$1,094
      • STL19:32
        26h 18m
        2 stops
        PNH09:50
        Fri, Jul 26|St. Louis - Phnom Penh|Alaska Airlines
        US$1,128
        US$1,128
      • STL06:30
        27h 40m
        2 stops
        PNH22:10
        Fri, Jun 28|St. Louis - Phnom Penh|Korean Air
        US$1,151
        US$1,151
      • STL06:30
        27h 40m
        2 stops
        PNH22:10
        Tue, Jun 25|St. Louis - Phnom Penh|Korean Air
        US$1,157
        US$1,157
      • STL07:00
        27h 10m
        2 stops
        PNH22:10
        Tue, Jun 25|St. Louis - Phnom Penh|Alaska Airlines
        US$1,158
        US$1,158
      • STL13:00
        3h 5m
        Direct
        PNH14:00
        Mon, Jun 3|St. Louis - Phnom Penh|American Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Searching for the best last minute flight from St. Louis to Phnom Penh? Find one-way or return flights that are affordable and fit your itinerary.

Trip.com monitors the ticket fares of flights from St. Louis to Phnom Penh. Stay updated on price trends and snag the best deals for your upcoming trip.

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from St. Louis to Phnom Penh

View airlines operating flights from St. Louis to Phnom Penh. Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

American Airlines
From US$891
Korean Air
From US$1,046
Delta Air Lines
From US$1,065
Alaska Airlines
From US$1,128
United Airlines
From US$1,408
Qatar Airways
From US$1,421
Cathay Pacific
From US$1,441
Lufthansa
From US$5,893
ANA airlines

Find more flights and airlines

Alternative Routes from St. Louis to Phnom Penh

Discover different routes, airlines, and transfers and find the best alternative flights for your journey from St. Louis to Phnom Penh.

  • Cheapest
    American Airlines
    STL
    06:29
    46h 31m
    2 transfer
    PNH
    17:00
    St. Louis Lambert International Airport - Phnom Penh International Airport
    Tue, Jun 25American Airlines
    US$891
  • American Airlines
    STL
    06:29
    46h 31m
    2 transfer
    PNH
    17:00
    St. Louis Lambert International Airport - Phnom Penh International Airport
    Tue, Jun 25American Airlines
    US$891
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from St. Louis (STL) to Phnom Penh (PNH) the cheapest?

    Airlines adjust prices for flights from St. Louis to Phnom Penh based on the departure date and time of your selection. By analyzing data from all airlines, we've discovered that on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much do flights from St. Louis (STL) to Phnom Penh (PNH) cost?

    According to Trip.com's data, the lowest price is around $2,402.

  • What is the transportation method from the main airport to downtown in Phnom Penh?

    • The distance from Phnom Penh International Airport to downtown is about 7km. It takes about 20 minutes by taxi.

How to find a cheap flight from St. Louis to Phnom Penh

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from St. Louis to Phnom Penh. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com
Flight Information from St. Louis to Phnom Penh

Off-season for travel

April

Peak season for travel

February

Flight distance

14,222.93km

Popular airline

American Airlines

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