$242 Cheap Flights from Lewiston (LWS) to St. Louis (STL)

View $242 flight on Tue, Aug 19, 2025Opens in a new window

Popular airlines from Lewiston, ID (LWS-Nez Perce County Regional) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Lewiston to St. Louis (LWS-STL)

Prices were available within the past 7 days and start at $242 for one-way flights and $426 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Thu, Nov 27 - Tue, Dec 16
LWS
Lewiston
STL
St. Louis
$426 Roundtrip, found 4 days ago
$426
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 27 from Lewiston to St. Louis, returning Tue, Dec 16, priced at $426 found 4 days ago
Delta
Thu, Nov 27 - Sun, Dec 14
LWS
Lewiston
STL
St. Louis
$431 Roundtrip, found 4 days ago
$431
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 27 from Lewiston to St. Louis, returning Sun, Dec 14, priced at $431 found 4 days ago
Delta
Tue, Jul 29 - Tue, Aug 19
LWS
Lewiston
STL
St. Louis
$436 Roundtrip, found 3 days ago
$436
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Jul 29 from Lewiston to St. Louis, returning Tue, Aug 19, priced at $436 found 3 days ago
Delta
Tue, Aug 26 - Tue, Sep 16
LWS
Lewiston
STL
St. Louis
$441 Roundtrip, found 3 days ago
$441
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 26 from Lewiston to St. Louis, returning Tue, Sep 16, priced at $441 found 3 days ago
Delta
Wed, Oct 22 - Tue, Nov 11
LWS
Lewiston
STL
St. Louis
$442 Roundtrip, found 4 days ago
$442
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Oct 22 from Lewiston to St. Louis, returning Tue, Nov 11, priced at $442 found 4 days ago
Delta
Tue, Aug 26 - Wed, Sep 17
LWS
Lewiston
STL
St. Louis
$445 Roundtrip, found 3 days ago
$445
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 26 from Lewiston to St. Louis, returning Wed, Sep 17, priced at $445 found 3 days ago
Delta
Wed, Nov 12 - Tue, Dec 2
LWS
Lewiston
STL
St. Louis
$446 Roundtrip, found 4 days ago
$446
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Nov 12 from Lewiston to St. Louis, returning Tue, Dec 2, priced at $446 found 4 days ago
Delta
Tue, Aug 26 - Fri, Sep 12
LWS
Lewiston
STL
St. Louis
$451 Roundtrip, found 3 days ago
$451
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Aug 26 from Lewiston to St. Louis, returning Fri, Sep 12, priced at $451 found 3 days ago
Delta
Thu, Aug 28 - Wed, Sep 17
LWS
Lewiston
STL
St. Louis
$451 Roundtrip, found 3 days ago
$451
Roundtrip
found 3 days ago
Select Delta flight, departing Thu, Aug 28 from Lewiston to St. Louis, returning Wed, Sep 17, priced at $451 found 3 days ago
Delta
Tue, Dec 2 - Tue, Dec 16
LWS
Lewiston
STL
St. Louis
$452 Roundtrip, found 4 days ago
$452
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Dec 2 from Lewiston to St. Louis, returning Tue, Dec 16, priced at $452 found 4 days ago

Alternative airports near St. Louis

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $483
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $483
Flights from Lewiston (LWS) to St. Louis (STL)
Origin airport
Nez Perce County Regional
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Delta
Roundtrip price
$426
Distance
1446 mi

Lewiston to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Lewiston 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 Lewiston 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 Lewiston to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $242 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 Lewiston 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 Lewiston 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.

 

Frequently asked questions

How much does a flight from Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from LWS to STL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from LWS to STL?
The cheapest flights from LWS to STL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from LWS to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LWS to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from LWS to STL?
Generally you'll find the largest variety of flight choices on a Friday. Tuesdays are often the quietest.* However, this can change depending on the time of year, 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 Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL)?
Select a flight from Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the likelihood of delays. Departures later than this are on average 22% more likely to be 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 Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book a flight from LWS to STL often results in higher prices. While you might find some last-minute offers, there's no guarantee. Allow some flexibility in your schedule for the best chance of snagging a bargain.
Is it cheaper to book a LWS to STL flight and hotel package?
Opting for a LWS to STL flight and hotel package is typically cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Pick from our impressive range of accommodations and then add activities, car rentals and flights 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 Nez Perce County Regional Airport (LWS) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to reschedule or cancel your LWS to STL flight. However, additional fees may apply, especially if you made your booking more than 24 hours ago. Check your itinerary for the airline's policies and fees on flight changes, or if you'd like further information, visit our Customer Service portal.

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*Available to One Key members.