$99 Cheap United flights St. Louis (STL) to Newark Liberty Intl. Airport (EWR)

View $99 flight on Tue, Sep 9, 2025Opens in a new window

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$99 Cheap United flights St. Louis (STL) to Newark Liberty Intl. Airport (EWR)

Prices were available within the past 7 days and start at $99 for one-way flights and $197 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Nov 11 - Wed, Nov 12
STL
St. Louis
EWR
New York
$197 Roundtrip, found 1 hour ago
$197
Roundtrip
found 1 hour ago
Select United flight, departing Tue, Nov 11 from St. Louis to New York, returning Wed, Nov 12, priced at $197 found 1 hour ago
United
Tue, Sep 9 - Tue, Sep 30
STL
St. Louis
EWR
New York
$207 Roundtrip, just found
$207
Roundtrip
just found
Select United flight, departing Tue, Sep 9 from St. Louis to New York, returning Tue, Sep 30, priced at $207 just found
United
Tue, Aug 19 - Mon, Aug 25
STL
St. Louis
EWR
New York
$209 Roundtrip, found 1 day ago
$209
Roundtrip
found 1 day ago
Select United flight, departing Tue, Aug 19 from St. Louis to New York, returning Mon, Aug 25, priced at $209 found 1 day ago
United
Tue, Sep 9 - Tue, Sep 30
STL
St. Louis
EWR
New York
$210 Roundtrip, just found
$210
Roundtrip
just found
Select United flight, departing Tue, Sep 9 from St. Louis to New York, returning Tue, Sep 30, priced at $210 just found
United
Tue, Sep 9 - Tue, Sep 30
STL
St. Louis
EWR
New York
$223 Roundtrip, just found
$223
Roundtrip
just found
Select United flight, departing Tue, Sep 9 from St. Louis to New York, returning Tue, Sep 30, priced at $223 just found
United
Sat, Oct 11 - Wed, Oct 15
STL
St. Louis
EWR
New York
$224 Roundtrip, found 2 hours ago
$224
Roundtrip
found 2 hours ago
Select United flight, departing Sat, Oct 11 from St. Louis to New York, returning Wed, Oct 15, priced at $224 found 2 hours ago
Flights from St. Louis (STL) to Newark Liberty Intl. Airport (EWR)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Newark Liberty Intl. Airport
Airlines serving
American Airlines, Delta, Frontier Airlines, Spirit Airlines, United
Popular airline
United
Distance
869 mi
Average flight time
3 hours 34 mins

Frequently asked questions

How much is a United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR)?
Finding cheap one-way United Airlines flights from STL to EWR from $99 on Expedia is easy — just filter by "Price (lowest to highest)." Alternatively, check out our budget-friendly return fares from $197 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from STL to EWR with United Airlines?
Browse for one-way or return flights to Newark in January or February. You could find lower fares with United Airlines during these off-peak times.
What is the cheapest time to book flights from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR) with United Airlines?
Look for cheap United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR) one to three months ahead of your departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare class and journey, the ideal day to book a domestic flight is usually Sunday and the most expensive day tends to be Monday. Passengers who book on a Sunday can save 6% on average compared to those who book their travel on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR)?
Yes, you can travel from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR) on any of United Airlines's 21 direct weekly flights. Apply Expedia's "Nonstop" and "Airline" filters to find the United Airlines flight that'll get you to EWR at your preferred time.
How long does it take to fly from STL to EWR with United Airlines?
Depart Lambert-St. Louis Intl. Airport (STL) for Liberty Intl. Airport (EWR) on a direct United Airlines flight, and you'll be in the air for approximately 2h 37m.
Which day of the week has the most United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR)?
If flexibility is what you're after, Friday offers the most choice for United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR). Take your pick of 3 different departures.
What is the earliest United Airlines flight from STL to EWR?
Leaving STL at 6:50AM UTC-6, the first United Airlines flight to EWR arrives at 10:29AM UTC-5. Flying early means you'll be less likely to encounter cancellations or delays.* Not an early riser? The last United Airlines flight from STL to EWR departs at 6:03PM UTC-6 and touches down at 9:42PM UTC-5.*Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Newark?
United Airlines flights from Lambert-St. Louis Intl. Airport (STL) to Newark arrive at Liberty Intl. Airport (EWR) and LaGuardia Airport (LGA). The main Newark gateway served by this carrier is EWR. It's always worth checking out flights landing at nearby airports on Expedia as they may offer cheaper tickets.
Why fly with United Airlines from STL to EWR?
Offering a rewarding loyalty program, United Airlines is a popular choice for many passengers flying from STL to EWR. Plus, as a United Mileage Plus and One Key™ member booking through Expedia, you can earn OneKeyCash™* on eligible flights on top of your airline miles.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
What type of plane does United Airlines fly from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR)?
United Airlines generally uses Embraer 175 planes for flights from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR). This carrier also operates the Embraer 170 on this route. Bear in mind that aircraft type can vary depending on operational requirements, so the plane you board might be different when you leave.
Can I change or cancel my United Airlines flight from Lambert-St. Louis Intl. Airport (STL) to Liberty Intl. Airport (EWR)?
Changes are often free within 24 hours of making a booking, but your airline may charge a fee after that time. For further information about altering your reservation, head to your "Trips," select your flight and click on "Manage Booking." If you want the freedom to change your plans without extra charges, tick the "Changes included" or "No cancel fee" filter when organizing your next escape.

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