$339 Cheap Flights from Pocatello (PIH) to St. Louis (STL)

View $339 flight on Fri, Nov 28, 2025Opens in a new window

Popular airlines from Pocatello, ID (PIH-Pocatello Regional) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Pocatello to St. Louis (PIH-STL)

Prices were available within the past 7 days and start at $339 for one-way flights and $407 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, Dec 30 - Tue, Jan 6
PIH
Pocatello
STL
St. Louis
$407 Roundtrip, found 3 hours ago
$407
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Dec 30 from Pocatello to St. Louis, returning Tue, Jan 6, priced at $407 found 3 hours ago
Delta
Tue, Dec 30 - Fri, Jan 2
PIH
Pocatello
STL
St. Louis
$417 Roundtrip, found 3 hours ago
$417
Roundtrip
found 3 hours ago
Select Delta flight, departing Tue, Dec 30 from Pocatello to St. Louis, returning Fri, Jan 2, priced at $417 found 3 hours ago
Delta
Fri, Dec 26 - Fri, Jan 2
PIH
Pocatello
STL
St. Louis
$427 Roundtrip, found 3 hours ago
$427
Roundtrip
found 3 hours ago
Select Delta flight, departing Fri, Dec 26 from Pocatello to St. Louis, returning Fri, Jan 2, priced at $427 found 3 hours ago
Delta
Wed, Nov 26 - Tue, Dec 2
PIH
Pocatello
STL
St. Louis
$432 Roundtrip, found 4 days ago
$432
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Nov 26 from Pocatello to St. Louis, returning Tue, Dec 2, priced at $432 found 4 days ago
Delta
Thu, Jan 1 - Fri, Jan 2
PIH
Pocatello
STL
St. Louis
$437 Roundtrip, found 3 hours ago
$437
Roundtrip
found 3 hours ago
Select Delta flight, departing Thu, Jan 1 from Pocatello to St. Louis, returning Fri, Jan 2, priced at $437 found 3 hours ago
Delta
Wed, Nov 26 - Fri, Dec 5
PIH
Pocatello
STL
St. Louis
$442 Roundtrip, found 4 days ago
$442
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Nov 26 from Pocatello to St. Louis, returning Fri, Dec 5, priced at $442 found 4 days ago
Delta
Sun, Nov 23 - Thu, Nov 27
PIH
Pocatello
STL
St. Louis
$447 Roundtrip, found 17 hours ago
$447
Roundtrip
found 17 hours ago
Select Delta flight, departing Sun, Nov 23 from Pocatello to St. Louis, returning Thu, Nov 27, priced at $447 found 17 hours ago
Delta
Fri, Nov 14 - Tue, Dec 2
PIH
Pocatello
STL
St. Louis
$467 Roundtrip, found 17 hours ago
$467
Roundtrip
found 17 hours ago
Select Delta flight, departing Fri, Nov 14 from Pocatello to St. Louis, returning Tue, Dec 2, priced at $467 found 17 hours ago
Delta
Sat, Nov 15 - Tue, Dec 2
PIH
Pocatello
STL
St. Louis
$472 Roundtrip, found 17 hours ago
$472
Roundtrip
found 17 hours ago
Select Delta flight, departing Sat, Nov 15 from Pocatello to St. Louis, returning Tue, Dec 2, priced at $472 found 17 hours ago
Delta
Tue, Nov 18 - Fri, Dec 5
PIH
Pocatello
STL
St. Louis
$477 Roundtrip, found 1 day ago
$477
Roundtrip
found 1 day ago
Select Delta flight, departing Tue, Nov 18 from Pocatello to St. Louis, returning Fri, Dec 5, priced at $477 found 1 day 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 $472
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $472

Frequently asked questions

How much does a flight from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $339 or cheap return flight from $407 from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL) 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 Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL)?
December is the most affordable month to fly from PIH to STL. Traveling during quieter months is often the key to landing a great deal.
What is the cheapest airline that flies from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from PIH to STL, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
How many flights per day from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll have to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel details and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PIH to STL?
You'll generally find Tuesday the quietest day for flights, while Fridays tend to be the busiest.* However this can change from season to season and during public holidays or peak travel times.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL)?
To avoid possible delays on the Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL) route, aim to fly before 3 PM. Later flights 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 Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Holding off until just before your departure to book a ticket from PIH to STL generally means paying more. While you might find some last-minute offers, they aren't always guaranteed. Keep your travel schedule open for the best chance of getting a bargain.
Is it cheaper to book a PIH to STL flight and hotel package?
Booking a PIH 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. Choose from our extensive range of hotels and then add car rentals, flights 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 Pocatello Regional Airport (PIH) to Lambert-St. Louis Intl. Airport (STL)?
Usually, it's possible to reschedule or cancel your PIH to STL flight. However, for bookings made more than 24 hours ago, additional fees may apply. Check your airline's policies in your itinerary to see what changes are possible and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Pocatello Regional
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Delta
Roundtrip price
$406
Distance
1193 mi

Book with confidence

Pocatello to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Pocatello 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 Pocatello 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 Pocatello to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $339 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 Pocatello 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 Pocatello 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.

 

Pocatello to St. Louis Flights

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*Available to One Key members.