EWR - STL

$101 Find Cheap Flights from Newark Liberty Airport to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Newark to St. Louis departing on 8/25. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Newark to St. Louis, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Newark to St. Louis, as well as popular online travel agencies
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Everything you should know

Cheapest round-trip
$303
Typical prices: $595-$412
United Airlines
Wed 7/1Wed 7/8
EWR - STL • Non-stop
Cheapest non-stop
$307
Typical prices: $545-$403
United Airlines
Tue 8/4Tue 8/11
EWR - STL • Non-stop
Top airlines
Cheapest • from $303 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 2h 44m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
Avoid delays
Most punctual • 87% on-time
Best time • Fewest delays
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $388 (round-trip)
Shortest trip • 4h 37m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 14% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 21% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
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We hope you love your trip to St. Louis!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Newark to St. Louis (EWR-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Newark to St. Louis that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Newark to St. Louis

Wed, Jul 1 - Wed, Jul 8
United Airlines Logo
10:17 pm - 11:44 pm
EWR
-
STL
2h 27mnonstop
United Airlines Logo
6:00 am - 12:06 pm
STL
-
EWR
5h 06m
1 stop
$303United Airlines
Thu, Jun 25 - Mon, Jul 6
Frontier Logo
5:58 am - 5:30 pm
EWR
-
STL
12h 32m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$304Frontier
Sun, Aug 2 - Mon, Aug 3
Frontier Logo
10:29 pm - 8:57 am
EWR
-
STL
11h 28m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$305Frontier
Thu, Jul 2 - Tue, Jul 7
Frontier Logo
5:58 am - 5:30 pm
EWR
-
STL
12h 32m
1 stop
Frontier Logo
6:34 pm - 1:03 am
STL
-
EWR
5h 29m
1 stop
$306Frontier
Fri, Jul 3 - Sun, Aug 9
Frontier Logo
10:29 pm - 8:52 am
EWR
-
STL
11h 23m
1 stop
Frontier Logo
6:34 pm - 9:28 pm
STL
-
EWR
25h 54m
1 stop
$307Frontier
Thu, Jul 9 - Mon, Jul 13
Frontier Logo
5:55 am - 5:37 pm
EWR
-
STL
12h 42m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$308Frontier
Sun, Jul 12 - Tue, Jul 14
Frontier Logo
10:29 pm - 8:57 am
EWR
-
STL
11h 28m
1 stop
Frontier Logo
4:09 pm - 10:31 am
STL
-
EWR
17h 22m
1 stop
$309Frontier
Wed, Jul 8 - Sat, Jul 11
Frontier Logo
11:30 am - 11:59 pm
EWR
-
STL
13h 29m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$310Frontier
Fri, Jul 3 - Mon, Aug 10
Frontier Logo
10:29 pm - 8:52 am
EWR
-
STL
11h 23m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$311Frontier
Sun, Jul 5 - Sat, Jul 11
Frontier Logo
5:55 am - 5:37 pm
EWR
-
STL
12h 42m
1 stop
Frontier Logo
4:57 pm - 1:03 am
STL
-
EWR
7h 06m
1 stop
$312Frontier
Booking Insights

KAYAK's insights & trends for Newark to St. Louis flights

Get data-powered insights and trends into flights from Newark to St. Louis to help you find the cheapest flights, the best time to fly and much more.

How much is a round-trip flight from Newark Airport to St. Louis?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Newark Airport to St. Louis departing in July.

What’s the cheapest day of the week to fly from Newark Liberty Airport to St. Louis?

The average price of all round-trip flights from Newark Airport to St. Louis clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to St. Louis on a Thursday, as we generally find the cheapest rates on that day for this route. On the other hand, Monday is the most expensive day to fly from Newark Liberty Airport to St. Louis. For your return ticket, we recommend flying on a Tuesday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Newark Airport to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Newark Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Newark Airport to St. Louis is October, where tickets cost $343 (return) on average. On the other hand, the most expensive months are March and July, where the average cost of round-trip tickets is $518 and $504 respectively.

Can I save money by flying with a layover from Newark Airport to St. Louis?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

Yes, flying with a layover may cost you more time, but you can also save money on the route, with a 1 stop layover the cheapest option at $497 on average.

How far in advance should I book a flight from Newark Airport to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Newark Airport to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Newark Airport to St. Louis, you should book around 3 weeks before departure, which saves you about 14% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Expert advice

Expert advice for your flight from Newark to St. Louis

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on EWR

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Good to know

Low seasonNovember
Cheapest flight$101
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from Newark Liberty Airport to St. Louis

When to book flights from Newark to St. Louis

Are your dates flexible? Find out the best times to travel from Newark to St. Louis based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Newark Liberty Airport to St. Louis flights

  • Are there changeable ticket options on flights from Newark Liberty Airport to St. Louis with United Airlines?

    Yes, United Airlines offers several changeable ticket options. Basic Economy tickets are the most restrictive and typically do not allow changes or cancellations. Economy tickets typically allow changes for a fee plus any difference in fare. United First and United Business tickets generally allow changes for a fee plus any difference in fare but the fee may be lower than for Economy tickets, and some fare classes may allow changes without a fee.

  • What is the luggage allowance on Spirit Airlines flights from Newark Liberty Airport to St. Louis?

    Spirit offers a bare fare that does not include checked or carry-on luggage on flights from Newark Liberty Airport to St. Louis. Passengers are required to pay for any bags they want to bring on the flight, including carry-on bags. Passengers can purchase up to five checked bags per flight. Bag fees vary depending on various factors, including the time of booking and the size and weight of the bag.

  • How do I get from Lambert-St-Louis Airport (STL) to the city center?

    The MetroLink light rail system has a station at STL, and you can take it to the city center. The train runs every 20 minutes during weekdays and every 30 minutes on weekends. Additionally, the MetroBus system also operates from the airport, and you can take the #49 bus to the city center. The bus stop is located outside of Terminal 1, Door 12.

  • What services does American Airlines offer economy-class passengers on flights from Newark Liberty Airport to St. Louis?

    American Airlines offers complimentary snacks and non-alcoholic beverages to economy-class passengers on flights from Newark Liberty Airport to St. Louis. These include soft drinks, coffee, and tea. Passengers can also enjoy a variety of in-flight entertainment options, including movies, TV shows, music, games, and Wi-Fi at a fee.

  • What is the cheapest flight from Newark Airport to St. Louis?

    In the last 5 days, the lowest price for a flight from Newark Airport to St. Louis was $101 for a one-way ticket and $303 for a round-trip.

  • Do I need a passport to fly between Newark Liberty Airport and St. Louis?

    A passport is not required to fly from Newark Liberty Airport to St. Louis.

  • Which airports will I be using when flying from Newark Liberty Airport to St. Louis?

    On your way to St. Louis, you’ll fly out from Newark. You’ll be landing at Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from Newark Liberty Airport to St. Louis?

    Delta, American Airlines, and JetBlue offer inflight Wi-Fi service on the Newark Liberty Airport to St. Louis flight route.

  • Which aircraft models fly most regularly from Newark Liberty Airport to St. Louis?

    The Embraer 175 (Enhanced Winglets) is the aircraft model that flies most regularly on the Newark Liberty Airport to St. Louis flight route.

  • Which airline alliances offer flights from Newark Liberty Airport to St. Louis?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Newark Liberty Airport and St. Louis, with oneworld being the most commonly used for this route.

  • On which days can I fly direct from Newark Liberty Airport to St. Louis?

    There are nonstop flights from Newark Liberty Airport to St. Louis on a daily basis.

  • Which is the best airline for flights from Newark to St. Louis, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Newark to St. Louis are Delta and United Airlines. With an average price for the route of $373 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $446 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Newark Liberty Airport to St. Louis?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Newark Liberty Airport to St. Louis.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Newark Liberty Airport to St. Louis?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from Newark Liberty Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Newark Liberty Airport to St. Louis?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to St. Louis with an airline and back to Newark Liberty Airport with another airline. Booking your flights between Newark Liberty Airport and STL can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Newark Liberty Airport to St. Louis?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to St. Louis from Newark Liberty Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Newark Airport to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $201 or less one-way and $441 or less round-trip.
  • Connecting flights from Newark Liberty Airport (EWR) to St. Louis (STL) usually have layovers in various cities depending on the airline you opt for. Some common layovers for this route include Orlando (MCO), Detroit (DTW), Chicago (ORD), Charlotte (CLT), and Atlanta (ATL).
  • American Airlines has implemented operational improvements to reduce its carbon emissions, such as optimizing flight routes to reduce the amount of fuel consumed during flights and reducing the amount of time spent idling on the tarmac including for flights from Newark Liberty Airport (EWR) to St. Louis (STL).
  • United Airlines offers child-friendly meals for children aged two to 12 years on flights from Newark Liberty Airport (EWR) to St. Louis (STL). The airline also offers a range of films, TV shows, and games suitable for children and allows the use of FAA-approved child restraint systems, including infant car seats, during flights.
  • Delta Airlines provides various forms of assistance onboard its flights from Newark Liberty Airport (EWR) to St. Louis (STL) for passengers with reduced mobility, including help with stowing and retrieving carry-on baggage, assistance with using the lavatory, and assistance with transfers.
  • Newark Liberty International Airport (EWR) is a hub for United Airlines which offers flights from Newark Liberty Airport to St. Louis. United Airlines operates from three terminals at Newark Airport: Terminal A, Terminal B, and Terminal C.

Prefer to fly direct from Newark Liberty Airport to St. Louis?

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from Newark to Lambert-St Louis.
Find which airlines fly direct from Newark Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

Newark to Lambert-St Louis

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

Lambert-St Louis to Newark

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top 4 airlines serving from Newark to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from Newark to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Newark to St. Louis? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.9
DeltaOverall score based on 8402 reviews
7.8Comfort
8.1Boarding
8.5Crew
7.8Entertainment
7.2Food
Airline reviews

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

8.0 ExcellentAnonymous, Jun 2026
JFK - ATL
Read more Delta reviews

On time! There were plenty of airport employees who were able to keep us moving in the right direction. The crew on the plane were professional.

I continue to be satisfied with Delta’s excellent service out of LGA. The digit id works well and gets me through security in no time. Whenever possible, I choose Delta.

Was revoked with Jet Blue due to delay from Kenya Air

WiFi didn’t work. Flight delayed 3 hours Crew members were illiterate Seat lean back did not work.

My flight yesterday evening was delayed 3.5 hours with no water or food service. Poor experience

Transparency from pilots, quick boarding and exiting the plane, staff greeted to each and everyone,

WiFi didn’t work most of the time. The usb chargers would work only occasionally for 5 mins and wouldn’t charge after that. Had to keep trying repeatedly at each of the seats in the row.

The crew bent over backwards to thank us for flying and make us comfortable. The food service was quick and efficient. The Captain communicated and said goodbye and thank you as we departed. They really stood out!

Flight delayed. Air broken. Cabin was hot enough to pass out. Delta shuttle’s becoming worse and worse.

my mom urmila patel needed a wheelchair which was not available on the curbside. she needed to walk almost 50 meters inside (at the risk of falling) and then had to wait in line to get a wheelchair (this is not ok). Once obtained she had to seat in it for 30-45 minutes for someone to take her in thru the checkin process (which was fairly smooth and easy). the lady who helped her with her checkin process was very courteous and helpful

I'm a United 1K member and have ben for 10 years. The gate agent had no control over the boarding process and had us passengers queued for hours as delays were announced. On the plane, the overhead air nozzle was broken so col over was powering through on me and the passenger next to me. Not a great experience for a million miler on United. Feel free to contact me. Josh Smigel - DM426089

As I wrote earlier, poor planning and/or communication. At least twice, we were told that we would be boarding in less than ten minutes, only to have the flight again delayed at least another hour.

Flight left on time, arrived early, pleasant staff provided water, coffee, etc. access to bathrooms was reasonable and were well maintained. blankets were available, lots of entertainment options. LUGGAGE SERVICE WAS GREAT. I got my one checked bag quickly and was able to make a bus connection for a 2 hour bus ride saving me from waiting another 1.5 hours.

They promise free wi-fi prior to boarding and then once on board you are informed you have to purchase wifi even after being a mileagePlus member.

Both our flights were delayed. Almost didn’t get in the second flight. Staff was rude to the bone.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

Airport terminal was outdated, flight was on a small jet with no wifi

Much better than Spirit. I was please by the easy fast check in and boarding

The attendant on board was amazing. She should be doing business/first international long haul.

Perfect flight. Smooth flight. Arrived 20 minutes early at destination. Excellent service.

Leave on time. We waited on the plane for hour hours and it was hot and smelly

Flying in the United States with the major airlines has become so underwhelming. A 2-3hr flight in most other parts of the world with the major carriers of the area comes with newer, CLEANER aircraft and significantly better in flight service in terms of both staff attitude and a actual meal service.

Wifi was spotty. Tray table was very dirty when I sat down.

Flight was extremely hot and they made us check our bags when the space was nowhere near full

Same plane as RDU to LGA — internet not working. Pilot issue of some sort at end of prior flight - I was on same plane for my connection. Late/delayed —

We called Kayak for a change due to the TSA situation in Atlanta. What we got was a canceled return flight (in error) and we had to find the mistake. Not happy with Kayak who blamed it on AA.

My flight from LGA was cancelled and my rebooked flight from JFK was delayed numerous times. I will now be getting home after 2am.

Flight was delayed half hour before boarding, but when I checked flight aware the plane that would Pick us up had a delay of more than an hour. AA should let us know in advance to avoid waiting several hours in the airport

There was no inflight service. Once we landed we were delayed to find a gate for an hour and a half which was 1/2 the total time in the air.

Small plane, poor meal choices for first class, bad terminal and boarding experience at LAX

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

They switched our terminal 3 times and we were delayed for four plus hours!!!

It was an early flight and most people napped/slept and the crew let us which was nice.

Everything you need to know for your flight from Newark to St. Louis

Information on your arrival and departure airports