$108 Cheap Flights from Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

View $108 flight on Thu, Jun 12, 2025Opens in a new window
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Cheap Flights from Newark Liberty Intl. Airport to St. Louis (EWR-STL)

Prices were available within the past 7 days and start at $108 for one-way flights and $208 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Spirit Airlines
Sun, May 4 - Tue, May 20
EWR
New York
STL
St. Louis
$208 Roundtrip, found 4 days ago
$208
Roundtrip
found 4 days ago
Select Spirit Airlines flight, departing Sun, May 4 from New York to St. Louis, returning Tue, May 20, priced at $208 found 4 days ago
Spirit Airlines
Thu, Jun 12 - Sat, Jun 21
EWR
New York
STL
St. Louis
$218 Roundtrip, found 5 hours ago
$218
Roundtrip
found 5 hours ago
Select Spirit Airlines flight, departing Thu, Jun 12 from New York to St. Louis, returning Sat, Jun 21, priced at $218 found 5 hours ago
United
Sat, Jul 19 - Tue, Jul 29
EWR
New York
STL
St. Louis
$221 Roundtrip, found 2 hours ago
$221
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Jul 19 from New York to St. Louis, returning Tue, Jul 29, priced at $221 found 2 hours ago
Spirit Airlines
Thu, Jun 12 - Sat, Jun 14
EWR
New York
STL
St. Louis
$228 Roundtrip, found 13 hours ago
$228
Roundtrip
found 13 hours ago
Select Spirit Airlines flight, departing Thu, Jun 12 from New York to St. Louis, returning Sat, Jun 14, priced at $228 found 13 hours ago
United
Wed, Aug 27 - Sat, Aug 30
EWR
New York
STL
St. Louis
$230 Roundtrip, found 5 hours ago
$230
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Aug 27 from New York to St. Louis, returning Sat, Aug 30, priced at $230 found 5 hours ago
United
Tue, Jun 3 - Sat, Jun 7
EWR
New York
STL
St. Louis
$231 Roundtrip, just found
$231
Roundtrip
just found
Select United flight, departing Tue, Jun 3 from New York to St. Louis, returning Sat, Jun 7, priced at $231 just found
Delta
Tue, Jul 22 - Wed, Jul 30
EWR
New York
STL
St. Louis
$233 Roundtrip, found 7 hours ago
$233
Roundtrip
found 7 hours ago
Select Delta flight, departing Tue, Jul 22 from New York to St. Louis, returning Wed, Jul 30, priced at $233 found 7 hours ago
United
Tue, Sep 16 - Tue, Sep 30
EWR
New York
STL
St. Louis
$233 Roundtrip, found 5 days ago
$233
Roundtrip
found 5 days ago
Select United flight, departing Tue, Sep 16 from New York to St. Louis, returning Tue, Sep 30, priced at $233 found 5 days ago
American Airlines
Tue, Jun 3 - Sat, Jun 7
EWR
New York
STL
St. Louis
$241 Roundtrip, just found
$241
Roundtrip
just found
Select American Airlines flight, departing Tue, Jun 3 from New York to St. Louis, returning Sat, Jun 7, priced at $241 just found
Frontier Airlines
Sat, Jun 14 - Tue, Jun 24
EWR
New York
STL
St. Louis
$253 Roundtrip, found 2 hours ago
$253
Roundtrip
found 2 hours ago
Select Frontier Airlines flight, departing Sat, Jun 14 from New York to St. Louis, returning Tue, Jun 24, priced at $253 found 2 hours ago
Flights from Newark Liberty Intl. Airport (EWR) to St. Louis (STL)
Origin airport
Newark Liberty Intl. Airport
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Alaska Airlines, American Airlines, Delta, Frontier Airlines, Spirit Airlines, United
Roundtrip price
$208
Distance
869 mi

Newark Liberty Intl. Airport to St. Louis Flights

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

The best time to book a flight from Newark Liberty Intl. Airport to St. Louis

Sunday is one of the best days to book for cheap flights from Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $108 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 Newark Liberty Intl. Airport 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 Newark Liberty Intl. Airport 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 Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL) cost?
You can book cheap return tickets starting from $221 from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a United and Southwest Airlines flight leaving EWR on May 10 2025 and touching down at STL. The price was last updated on April 24 2025 and has not changed since.
What is the cheapest month to fly from EWR to STL?
The cheapest flights from EWR 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.
Which airlines fly direct from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
Fly directly from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL) on a United Airlines flight.
What is the cheapest airline that flies from EWR to STL?
With prices as low as $111 for a one-way journey from EWR to STL, United is currently the cheapest carrier on this route. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from EWR on July 19 2025. Prices were last updated on April 24 2025 and have not changed since.
How many flights per day from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
Every day, an average of 3 nonstop flights take off from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). Select the departure date that best suits your travel plans.
What are the most popular departure times for flights from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
Flights between EWR and STL are their busiest at 8 AM. If you’d like a more relaxed experience and possibly cheaper tickets, look for a departure that’s outside typical rush times.
What day of the week has the most flights from EWR to STL?
Friday has the most flights from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). Consider traveling on this day and you’ll have a greater chance of finding a departure that fits your schedule.
What is the earliest flight from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
The earliest flight leaving Liberty Intl. Airport (EWR) is at around 8:43AM UTC-5. Catch this flight and you’ll arrive at Lambert-St. Louis Intl. Airport (STL) at approximately 10:43AM UTC-6. The total time in the air is 3h.
How long does it take to fly from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
Flights from EWR to STL have an average travel time of 2 hours and 58 minutes. The distance between these two airports is 870 mi.
What is the best time to fly from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
Select a flight from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL) that leaves before 3 PM to reduce the risk of cancellations and delays. Departures after this hour 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.
What airports do you fly into for St. Louis from Liberty Intl. Airport (EWR)?
Explore your flight options from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). This is the only St. Louis airport you can touch down at if you’re taking a direct flight.
Is it cheaper to buy a plane ticket from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your plane ticket from EWR to STL right before your trip is usually more expensive. But if there’s some wiggle room with your departure dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book an EWR to STL flight and hotel package?
Opting for an EWR to STL flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Select from our extensive 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 Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL)?
In most cases, you can modify or cancel your EWR to STL flight. However, additional charges may apply, especially if you made your booking more than 24 hours ago. Double-check your itinerary for the airline’s policies and fees on flight changes, or if you need further information, visit our Customer Service portal.

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*Available to One Key members.