In terms of precipitation, rainfall in Rock Springs ranges from 0.5 - 1.2 inches per month. May is typically the wettest month, when rainfall can reach 1.2 in. January is typically the driest time to visit Rock Springs when rainfall is around 0.5 in.

If weather is an important factor for your trip to Rock Springs, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.2 F).

Can I find deals for flights from Portland to Rock Springs that include hotel bookings?

Yes. In addition to deals on Portland to Rock Springs flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Portland to Rock Springs?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Rock Springs.

Can I find deals for business class flights from Portland to Rock Springs?

Yes. Cheapflights offers flight deals from Portland to Rock Springs by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$316+ Flights from Portland to Rock Springs

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Cheap flight deals from Portland to Rock Springs

Round-trip from	$422 (United Airlines)
One-way from	$316 (United Airlines)

From Portland to Rock Springs Sweetwater County

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One-way flight from Portland to Rock Springs Sweetwater County

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Find flight deals from Portland to Rock Springs

Cheapest flights from Portland to Rock Springs
Explore the most affordable flight options available from Portland to Rock Springs. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Sun 8/1012:55 pmPDX - RKS

1 stop8h 18mUnited Airlines

Sat 8/165:33 amRKS - PDX

1 stop4h 59mUnited Airlines

Deal found 7/3

$422

Best flights from Portland to Rock Springs
Discover carefully curated flight deals from Portland to Rock Springs that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 3, 2025.

Sun 8/1012:55 pmPDX - RKS

1 stop8h 18mUnited Airlines

Sat 8/165:33 amRKS - PDX

1 stop4h 59mUnited Airlines

Deal found 7/3

$422

Last-minute flights from Portland to Rock Springs
Discover last-minute flight deals from Portland to Rock Springs. Data last updated July 3, 2025 and is based on user searches.

Sun 8/1012:55 pmPDX - RKS

1 stop8h 18mUnited Airlines

Sat 8/165:33 amRKS - PDX

1 stop4h 59mUnited Airlines

Deal found 7/3

$422

One-way flights from Portland to Rock Springs
Search for one-way flight options from Portland to Rock Springs. Find affordable one-way fares based on user searches. Data last updated July 3, 2025.

Mon 9/295:00 amPDX - RKS

1 stop7h 23mUnited Airlines

Deal found 7/3

$316

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Rock Springs that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandRock Springs

PDX - RKS

PDXRKS

Portland

Sun 8/10

12:55 pm-10:13 pm

1 stop8h 18m

Rock Springs Sweetwater County

Sat 8/16

5:33 am-9:32 am

1 stop4h 59m

$422

PortlandRock Springs

PDX - RKS

PDXRKS

Portland

Mon 9/29

5:00 am-1:23 pm

1 stop7h 23m

$316

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/3

Best time to book a flight from Portland to Rock Springs

Have a flexible travel schedule? Discover the best time to fly to Rock Springs from Portland with our price prediction graph.

Estimated round-trip price

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Everything you need to know about your flight from Portland to Rock Springs

What is the cheapest time of day to fly from PDX to RKS?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Rock Springs as you normally would.

Reviews of airlines servicing Rock Springs

Peruse reviews from past customers who have flown with United Airlines from Portland to Rock Springs to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,845 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines

7.4

Good

8,845 reviews

United Airlines

7.4

Good

8,845 reviews

Reviews

1 / 20

2.0

Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

Can I find deals for flights from Portland to Rock Springs that include hotel bookings?
Yes. In addition to deals on Portland to Rock Springs flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Portland to Rock Springs?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Rock Springs.
Can I find deals for business class flights from Portland to Rock Springs?
Yes. Cheapflights offers flight deals from Portland to Rock Springs by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Portland to Rock Springs

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$316+ Cheap flights from Portland to Rock Springs (PDX - RKS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/29. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Portland to Rock Springs with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Portland to Rock Springs

Round-trip from

One-way from

Find flight deals from Portland to Rock Springs

Cheapest flights from Portland to Rock SpringsExplore the most affordable flight options available from Portland to Rock Springs. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Explore the most affordable flight options available from Portland to Rock Springs. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Portland to Rock Springs that are best for you.

Best time to book a flight from Portland to Rock Springs

Have a flexible travel schedule? Discover the best time to fly to Rock Springs from Portland with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Portland to Rock Springs

What is the cheapest time of day to fly from PDX to RKS?

Find hourly flight availability from Portland to Rock Springs. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

Reviews of airlines servicing Rock Springs

Peruse reviews from past customers who have flown with United Airlines from Portland to Rock Springs to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Portland to Rock Springs. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Portland to Rock Springs that include hotel bookings?

How can I find direct flights from Portland to Rock Springs?

Can I find deals for business class flights from Portland to Rock Springs?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Portland to Rock Springs

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Travel Smart

Cheapest flights from Portland to Rock Springs
Explore the most affordable flight options available from Portland to Rock Springs. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.