$239 Cheap Flights from Ithaca (ITH) to St. Louis (STL)

View $239 flight on Thu, Nov 13, 2025Opens in a new window

Popular airlines from Ithaca, NY (ITH-Tompkins Regional) to St. Louis Lambert Intl. Airport (STL)

Cheap Flights from Ithaca to St. Louis (ITH-STL)

Prices were available within the past 7 days and start at $239 for one-way flights and $254 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Nov 12 - Tue, Nov 18
ITH
Ithaca
STL
St. Louis
$254 Roundtrip, just found
$254
Roundtrip
just found
Select Delta flight, departing Wed, Nov 12 from Ithaca to St. Louis, returning Tue, Nov 18, priced at $254 just found
Delta
Tue, Dec 2 - Mon, Dec 15
ITH
Ithaca
STL
St. Louis
$274 Roundtrip, found 4 days ago
$274
Roundtrip
found 4 days ago
Select Delta flight, departing Tue, Dec 2 from Ithaca to St. Louis, returning Mon, Dec 15, priced at $274 found 4 days ago
Delta
Tue, Nov 11 - Mon, Nov 17
ITH
Ithaca
STL
St. Louis
$279 Roundtrip, just found
$279
Roundtrip
just found
Select Delta flight, departing Tue, Nov 11 from Ithaca to St. Louis, returning Mon, Nov 17, priced at $279 just found
Delta
Tue, Nov 11 - Wed, Nov 19
ITH
Ithaca
STL
St. Louis
$284 Roundtrip, just found
$284
Roundtrip
just found
Select Delta flight, departing Tue, Nov 11 from Ithaca to St. Louis, returning Wed, Nov 19, priced at $284 just found
Delta
Fri, Oct 31 - Tue, Nov 4
ITH
Ithaca
STL
St. Louis
$295 Roundtrip, found 3 days ago
$295
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 31 from Ithaca to St. Louis, returning Tue, Nov 4, priced at $295 found 3 days ago
Delta
Wed, Dec 3 - Mon, Dec 15
ITH
Ithaca
STL
St. Louis
$299 Roundtrip, found 4 days ago
$299
Roundtrip
found 4 days ago
Select Delta flight, departing Wed, Dec 3 from Ithaca to St. Louis, returning Mon, Dec 15, priced at $299 found 4 days ago
Delta
Thu, Nov 27 - Mon, Dec 8
ITH
Ithaca
STL
St. Louis
$319 Roundtrip, found 4 days ago
$319
Roundtrip
found 4 days ago
Select Delta flight, departing Thu, Nov 27 from Ithaca to St. Louis, returning Mon, Dec 8, priced at $319 found 4 days ago
Delta
Fri, Oct 31 - Mon, Nov 3
ITH
Ithaca
STL
St. Louis
$320 Roundtrip, found 3 days ago
$320
Roundtrip
found 3 days ago
Select Delta flight, departing Fri, Oct 31 from Ithaca to St. Louis, returning Mon, Nov 3, priced at $320 found 3 days ago
Delta
Wed, Nov 12 - Tue, Nov 18
ITH
Ithaca
STL
St. Louis
$324 Roundtrip, just found
$324
Roundtrip
just found
Select Delta flight, departing Wed, Nov 12 from Ithaca to St. Louis, returning Tue, Nov 18, priced at $324 just found
United
Thu, Nov 13 - Sat, Nov 15
ITH
Ithaca
STL
St. Louis
$354 Roundtrip, just found
$354
Roundtrip
just found
Select United flight, departing Thu, Nov 13 from Ithaca to St. Louis, returning Sat, Nov 15, priced at $354 just found

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 $384
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $384

Frequently asked questions

How much does a flight from Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $239 or cheap return flight from $254 from Tompkins Regional Airport (ITH) 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 Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from ITH to STL is November, when there's less demand. Off-peak months are generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline flying from ITH to STL, use Expedia's filter tool. Tailor your search based on what matters most to you, 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 Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL)?
There aren't any daily nonstop flights from Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL). But you can opt for flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds in no time at all.
What day of the week has the most flights from ITH to STL?
You'll typically 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 Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL)?
Choose a flight from Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL) that takes off before 3 PM to reduce the likelihood of delays and cancellations. 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 Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from ITH to STL right before your trip is generally more expensive. But if there's some wiggle room with your schedule, you could land a cheap last-minute fare.
Is it cheaper to book an ITH to STL flight and hotel package?
You'll typically save money by booking an ITH to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal flights and accommodations, consider adding extras including car rentals, activities and tours.
Can I cancel or change the date of my flight from Tompkins Regional Airport (ITH) to Lambert-St. Louis Intl. Airport (STL)?
In most instances, you're able to cancel or reschedule your ITH to STL flight. However, there may be additional charges, especially if you booked over 24 hours ago. Check your itinerary for the airline's fees and guidelines on flight changes, or if you want further information, head to our Customer Service portal.

Travel information

Origin airport
Tompkins Regional
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Delta, United
Roundtrip price
$254
Distance
773 mi

Book with confidence

Ithaca to St. Louis Flights

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

 

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

Sunday is one of the best days to book for cheap flights from Ithaca 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 Ithaca 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 Ithaca to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $239 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 Ithaca 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 Ithaca 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.

 

Ithaca to St. Louis Flights

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*Available to One Key members.