Cheap Flights from Phnom Penh (PNH) to St. Louis (STL)

Popular airlines from Phnom Penh Intl. Airport (PNH) to St. Louis Lambert Intl. Airport (STL)

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Frequently asked questions

How much does a flight from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL) cost?
Secure a cheap one-way flight or cheap return flight from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL)?
Planning your getaway for is a great way to save, as it's the cheapest month for flights between PNH and STL. You'll usually find the lowest fares during the off-season.
What is the cheapest airline that flies from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL)?
Expedia's filter tool lets you easily compare different airlines, departure times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to see which carrier offers the cheapest PNH to STL flight.
How many flights per day from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL)?
You'll have to hop on a flight with a layover if you're traveling from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from PNH to STL?
You'll usually find Tuesday the quietest day for flights, while Fridays are often the busiest.* However this can vary from season to season and during peak travel times or public holidays.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of cancellation.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from PNH to STL right before your journey is usually more expensive. However, if there's some wiggle room with your schedule, you could bag a cheap last-minute fare.
Is it cheaper to book a PNH to STL flight and hotel package?
Opting for a PNH to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip all in one place. Select from our impressive range of accommodations and then add flights, car rentals and activities to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Phnom Penh Intl. Airport (PNH) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you can cancel or reschedule your PNH to STL flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Check your itinerary for the airline's rules and fees on flight changes, or if you'd like more details, go to our Customer Service portal.

Travel information

Travel information

Origin airport
Phnom Penh Intl.
Destination airport
Lambert-St. Louis Intl.
Distance
8825 mi

Book with confidence

Book with confidence

Phnom Penh to St. Louis Flights

The cheapest times to fly from Phnom Penh to St. Louis

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Phnom Penh to St. Louis are during the month of . You can find some of the cheapest flights from Phnom Penh to St. Louis with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phnom Penh to St. Louis

Sunday is one of the best days to book for cheap flights from Phnom Penh to St. Louis: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Phnom Penh to St. Louis

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Phnom Penh to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Phnom Penh to St. Louis flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Phnom Penh to St. Louis airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Phnom Penh to St. Louis Flights

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*Available to One Key members.