$258 Cheap Flights from Phoenix (PHX) to Rock Springs (RKS)

View $258 flight on Fri, Oct 31, 2025Opens in a new window

Popular airlines from Phoenix Sky Harbor Intl. Airport (PHX) to Rock Springs, WY (RKS-Sweetwater County)

Cheap Flights from Phoenix to Rock Springs (PHX-RKS)

Prices were available within the past 7 days and start at $258 for one-way flights and $243 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Tue, Sep 30 - Tue, Oct 7
PHX
Phoenix
RKS
Rock Springs
$243 Roundtrip, found 1 day ago
$243
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 30 from Phoenix to Rock Springs, returning Tue, Oct 7, priced at $243 found 1 day ago
United
Thu, Sep 25 - Sun, Sep 28
PHX
Phoenix
RKS
Rock Springs
$248 Roundtrip, found 6 days ago
$248
Roundtrip
found 6 days ago
Select United flight, departing Thu, Sep 25 from Phoenix to Rock Springs, returning Sun, Sep 28, priced at $248 found 6 days ago
United
Sun, Sep 28 - Sun, Oct 5
PHX
Phoenix
RKS
Rock Springs
$256 Roundtrip, found 3 days ago
$256
Roundtrip
found 3 days ago
Select United flight, departing Sun, Sep 28 from Phoenix to Rock Springs, returning Sun, Oct 5, priced at $256 found 3 days ago
United
Wed, Sep 24 - Wed, Oct 1
PHX
Phoenix
RKS
Rock Springs
$273 Roundtrip, found 11 hours ago
$273
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Sep 24 from Phoenix to Rock Springs, returning Wed, Oct 1, priced at $273 found 11 hours ago
United
Wed, Sep 24 - Wed, Oct 1
PHX
Phoenix
RKS
Rock Springs
$279 Roundtrip, found 11 hours ago
$279
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Sep 24 from Phoenix to Rock Springs, returning Wed, Oct 1, priced at $279 found 11 hours ago
United
Wed, Sep 24 - Wed, Oct 1
PHX
Phoenix
RKS
Rock Springs
$284 Roundtrip, found 11 hours ago
$284
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Sep 24 from Phoenix to Rock Springs, returning Wed, Oct 1, priced at $284 found 11 hours ago
United
Tue, Sep 30 - Tue, Oct 7
PHX
Phoenix
RKS
Rock Springs
$294 Roundtrip, found 1 day ago
$294
Roundtrip
found 1 day ago
Select United flight, departing Tue, Sep 30 from Phoenix to Rock Springs, returning Tue, Oct 7, priced at $294 found 1 day ago
United
Mon, Sep 29 - Mon, Oct 6
PHX
Phoenix
RKS
Rock Springs
$294 Roundtrip, found 2 days ago
$294
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 29 from Phoenix to Rock Springs, returning Mon, Oct 6, priced at $294 found 2 days ago
United
Wed, Sep 24 - Sun, Sep 28
PHX
Phoenix
RKS
Rock Springs
$298 Roundtrip, found 11 hours ago
$298
Roundtrip
found 11 hours ago
Select United flight, departing Wed, Sep 24 from Phoenix to Rock Springs, returning Sun, Sep 28, priced at $298 found 11 hours ago
United
Mon, Sep 29 - Mon, Oct 6
PHX
Phoenix
RKS
Rock Springs
$299 Roundtrip, found 2 days ago
$299
Roundtrip
found 2 days ago
Select United flight, departing Mon, Sep 29 from Phoenix to Rock Springs, returning Mon, Oct 6, priced at $299 found 2 days ago

Frequently asked questions

How much does a flight from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS) cost?
Grab a cheap one-way flight from $258 or cheap return flight from $243 from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS)?
September is the least expensive month to fly from PHX to RKS. Traveling outside of peak seasons is often the key to finding better fares.
What is the cheapest airline that flies from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS)?
To find the cheapest airline that'll fly you from PHX to RKS, use Expedia's filter tool. Customize your search based on your travel needs, such as preferred carriers and flight duration. You can then sort your results by "Price (lowest to highest)" to see the most affordable options first.
How many flights per day from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS)?
You'll need to catch a flight with a layover when traveling from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS). There are no daily direct flights on this route. However, simply filter your search to include one or more stops to discover an option that works for you.
What day of the week has the most flights from PHX to RKS?
Generally you'll find the greatest selection of flight options on a Friday. Tuesdays tend to be the quietest.* However, this can change depending on the time of year, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS)?
To touch down at Sweetwater County Airport (RKS) on time, book a flight that takes off from Sky Harbor Intl. Airport (PHX) before 3 PM. The likelihood 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 Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS) last-minute?
Booking your flight from PHX to RKS right before your getaway is typically more expensive. But if there's some wiggle room with your travel times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a PHX to RKS flight and hotel package?
Compared with arranging flights and hotels separately, booking a PHX to RKS flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one convenient place will take the hassle out of planning your trip. Just pick your flights and choose from our wide range of hotels, then tailor your trip with extras like tours, activities and car rentals.
Can I cancel or change the date of my flight from Sky Harbor Intl. Airport (PHX) to Sweetwater County Airport (RKS)?
If you reserved your PHX to RKS flight within the last 24 hours, you may be able to modify or cancel it without fees. Depending on the airline and the ticket type 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, go to our Customer Service portal if you'd like more information.

Travel information

Travel information

Origin airport
Sky Harbor Intl.
Destination airport
Sweetwater County
Airlines serving
United
Roundtrip price
$243
Distance
586 mi

Book with confidence

Book with confidence

Phoenix to Rock Springs Flights

The cheapest times to fly from Phoenix 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 Phoenix to Rock Springs are during the month of September. You can find some of the cheapest flights from Phoenix to Rock Springs with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Phoenix to Rock Springs

Sunday is one of the best days to book for cheap flights from Phoenix 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 Phoenix 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 Phoenix to Rock Springs in 2025. You can also book with separate airlines for your outbound and return journeys, from $258 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 Phoenix 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 Phoenix 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.

 

Phoenix to Rock Springs Flights

Explore a world of travel with Expedia

Explore a world of travel with Expedia

*Available to One Key members.