$111 Cheap United flights Newark Liberty Intl. Airport (EWR) to St. Louis (STL)

Apply the “Price (lowest to highest)” filter on Expedia to look for cheap United Airlines round-trip flights from $221 from EWR to STL. Affordable one-way tickets from $111 are also on offer.**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.

Search for one-way or return flights to St. Louis in January or February. You could find a cheap fare with United Airlines during these quieter months.

Begin your search one to three months before your departure to get cheaper fares on United Airlines flights from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). You can save 25% by booking your domestic flight 34 to 86 days in advance compared to last-minute reservations made 6 to 12 days out. You could also cut costs by buying your fare on a Sunday, as it’s 6% cheaper on average than a Monday, the most expensive day to book.* Get the timing right, and you can enjoy significant savings on domestic trips.*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.

United Airlines has direct flights from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL), with 21 departures each week. Just apply the “Nonstop” and “Airline” filters while searching on Expedia to see all direct United Airlines flights to STL.

It takes around 2h 58m to fly nonstop from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL) with United Airlines.

Friday has the most United Airlines flights from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). With 3 daily departures, this is the best day to find something that will work for your schedule.

The earliest flight from EWR to STL with United Airlines departs at 8:43AM UTC-5. You’ll land at 10:43AM UTC-6. The last United Airlines flight of the day takes off at 10:29PM UTC-5 and arrives at 12:27AM UTC-6. With around 20% fewer cancellations for departures before noon, beginning your travel day early is typically the best way to go.**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.

United Airlines flights from Liberty Intl. Airport (EWR) to St. Louis come in to land at Lambert-St. Louis Intl. Airport (STL). This is the main gateway to this city.

A rewarding loyalty program and the ability to rack up points through United Mileage Plus are the start of the reasons to fly from EWR to STL with United Airlines. Plus, by joining Expedia’s free One Key™ program, you can earn OneKeyCash™* in addition to United Airlines’s loyalty program earnings. It’s yours to spend on future bookings.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.

You’ll likely board an Embraer 175 or an Embraer 170 when flying United Airlines from Liberty Intl. Airport (EWR) to Lambert-St. Louis Intl. Airport (STL). However, keep in mind that a different aircraft may be used depending on operational factors.

Typically, you can cancel or modify your flight, although there may be additional charges if you booked over 24 hours ago. Prefer to keep your options open? Use Expedia’s “Changes included” or “No cancel fee” filter to find flights that won’t charge extra if you have to adjust your plans. To modify your booking, head to “Trips,” select your flight and click on “Manage Booking” for more details.