$337 Cheap Flights from Newark Liberty Intl. Airport (EWR) to Rock Springs (RKS)

View $337 flight on Wed, Dec 10, 2025Opens in a new window

Popular airlines from Newark Liberty Intl. Airport (EWR) to Rock Springs, WY (RKS-Sweetwater County)

Cheap Flights from Newark Liberty Intl. Airport to Rock Springs (EWR-RKS)

Prices were available within the past 7 days and start at $337 for one-way flights and $278 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$278 Roundtrip, found 1 day ago
$278
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $278 found 1 day ago
United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$368 Roundtrip, found 1 day ago
$368
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $368 found 1 day ago
United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$371 Roundtrip, found 1 day ago
$371
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $371 found 1 day ago
United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$382 Roundtrip, found 1 day ago
$382
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $382 found 1 day ago
United
Sat, Jan 24 - Fri, Jan 30
EWR
New York
RKS
Rock Springs
$403 Roundtrip, found 2 days ago
$403
Roundtrip
found 2 days ago
Select United flight, departing Sat, Jan 24 from New York to Rock Springs, returning Fri, Jan 30, priced at $403 found 2 days ago
United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$424 Roundtrip, found 1 day ago
$424
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $424 found 1 day ago
United
Tue, Dec 16 - Thu, Dec 25
EWR
New York
RKS
Rock Springs
$432 Roundtrip, found 1 day ago
$432
Roundtrip
found 1 day ago
Select United flight, departing Tue, Dec 16 from New York to Rock Springs, returning Thu, Dec 25, priced at $432 found 1 day ago
United
Sat, Nov 22 - Sun, Dec 7
EWR
New York
RKS
Rock Springs
$438 Roundtrip, found 5 days ago
$438
Roundtrip
found 5 days ago
Select United flight, departing Sat, Nov 22 from New York to Rock Springs, returning Sun, Dec 7, priced at $438 found 5 days ago
United
Thu, Dec 11 - Tue, Dec 16
EWR
New York
RKS
Rock Springs
$448 Roundtrip, found 1 day ago
$448
Roundtrip
found 1 day ago
Select United flight, departing Thu, Dec 11 from New York to Rock Springs, returning Tue, Dec 16, priced at $448 found 1 day ago
United
Wed, Dec 17 - Tue, Dec 30
EWR
New York
RKS
Rock Springs
$452 Roundtrip, found 5 days ago
$452
Roundtrip
found 5 days ago
Select United flight, departing Wed, Dec 17 from New York to Rock Springs, returning Tue, Dec 30, priced at $452 found 5 days ago

Frequently asked questions

How much does a flight from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS) cost?
Lock in a cheap one-way flight from $337 or cheap return flight from $278 from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS)?
December is the most affordable month to fly from EWR to RKS. Traveling during an off-peak travel window is often the key to finding a great deal.
What is the cheapest airline that flies from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS)?
To find the cheapest airline that'll fly you from EWR to RKS, use Expedia's filter tool. Tailor your search based on what matters most to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to discover the cheapest flight right away.
How many flights per day from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS)?
There aren't any daily nonstop flights from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS). But you can book flights with layovers. Filter your search on Expedia to include one or more stops, and you'll be on your way before you know it.
What day of the week has the most flights from EWR to RKS?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Remember that flight schedules can change based on a number of factors, such as the carrier and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS)?
To touch down at Sweetwater County Airport (RKS) without delays, book a flight that leaves Liberty Intl. Airport (EWR) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**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 Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS) last-minute?
Last-minute bookings from EWR to RKS are typically more expensive. To secure the best rates, start looking for flights well ahead of time. That said, if you're flexible with your travel plans, you may score a cheap fare just before your departure.
Is it cheaper to book an EWR to RKS flight and hotel package?
Securing an EWR to RKS flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your travels all in one place. Choose from our impressive range of accommodations and then add car rentals, activities and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Liberty Intl. Airport (EWR) to Sweetwater County Airport (RKS)?
If you booked your EWR to RKS flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you want more information.

Travel information

Origin airport
Newark Liberty Intl. Airport
Destination airport
Sweetwater County
Airlines serving
United
Roundtrip price
$278
Distance
1804 mi

Book with confidence

Newark Liberty Intl. Airport to Rock Springs Flights

The cheapest times to fly from Newark Liberty Intl. Airport to Rock Springs

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 Rock Springs are during the month of December. You can find some of the cheapest flights from Newark Liberty Intl. Airport to Rock Springs with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Newark Liberty Intl. Airport to Rock Springs

Sunday is one of the best days to book for cheap flights from Newark Liberty Intl. Airport to Rock Springs: 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 Rock Springs

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 Rock Springs in 2025. You can also book with separate airlines for your outbound and return journeys, from $337 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 Rock Springs 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 Rock Springs 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.

 

Newark Liberty Intl. Airport to Rock Springs Flights

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*Available to One Key members.