Cheap Flights from St. Louis (STL) to Plymouth (PLH)

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Plymouth (PLH-Plymouth City)

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City) cost?
Secure a cheap one-way flight or cheap return flight from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City)?
is the cheapest month to fly from STL to PLH. Planning your trip for the off-season is often the key to better flight prices.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City)?
To find the cheapest airline flying from STL to PLH, use Expedia's filter tool. Customize your search based on your travel style, such as preferred carriers and seat class. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City)?
You'll have to hop on a flight with a layover when traveling from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City). Direct flights don't operate daily on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from STL to PLH?
Typically you'll find the largest variety of flight choices on a Friday. Tuesdays tend to be the quietest.* But this can change based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City)?
To avoid possible delays on the Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City) route, aim to travel before 3 PM. Later departures have a 22% higher chance of being canceled.**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 Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City) last-minute?
Booking your flight from STL to PLH right before your trip is usually more expensive. But if there's some wiggle room with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book a STL to PLH flight and hotel package?
You'll generally save money by booking a STL to PLH flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one place. Once you've chosen your ideal accommodations and flights, you can add extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Plymouth (PLH-Plymouth City)?
If you reserved your STL to PLH flight in the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, visit our Customer Service portal if you want more information.

Travel information

Origin airport
Lambert-St. Louis Intl.
Destination airport
Plymouth City
Distance
4077 mi

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St. Louis to Plymouth Flights

The cheapest times to fly from St. Louis to Plymouth

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 St. Louis to Plymouth are during the month of . You can find some of the cheapest flights from St. Louis to Plymouth with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to Plymouth

Sunday is one of the best days to book for cheap flights from St. Louis to Plymouth: 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 St. Louis to Plymouth

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 St. Louis to Plymouth 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 St. Louis to Plymouth 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 St. Louis to Plymouth 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.

 

St. Louis to Plymouth Flights

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*Available to One Key members.