Cheap flights from Washington, D.C. to Rock Springs from $504

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to Rock Springs departing on 8/14. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. to Rock Springs

Cheap round-trip flights

United Airlines Logo
6:30 am - 1:05 pmIAD-RKS
8h 35m1 stop
United Airlines Logo
5:33 am - 1:26 pmRKS-IAD
5h 53m1 stop
$504United Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
United Airlines Logo
6:30 am - 1:05 pmIAD-RKS
8h 35m1 stop
United Airlines Logo
5:33 am - 4:21 pmRKS-IAD
8h 48m2 stops
$753United Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18
United Airlines Logo
6:35 am - 1:05 pmIAD-RKS
8h 30m2 stops
United Airlines Logo
5:33 am - 4:10 pmRKS-IAD
8h 37m2 stops
$942United Airlines
Find Deal
Thu, Aug 14 - Mon, Aug 18

United Airlines flights from Washington, D.C. to Rock Springs

Our best United Airlines deals on Washington, D.C. to Rock Springs flight tickets
United Airlines
Aug 14
IAD6:30 amWashington, D.C. Dulles Intl
8h 35m
1 stop
RKS1:05 pmRock Springs Sweetwater County
Aug 18
RKS5:33 amRock Springs Sweetwater County
5h 53m
1 stop
IAD1:26 pmWashington, D.C. Dulles Intl
United Airlines
Aug 2
IAD3:56 pmWashington, D.C. Dulles Intl
8h 17m
1 stop
RKS10:13 pmRock Springs Sweetwater County
Aug 4
RKS1:48 pmRock Springs Sweetwater County
15h 40m
2 stops
IAD7:28 amWashington, D.C. Dulles Intl
United Airlines
Aug 14
IAD6:30 amWashington, D.C. Dulles Intl
8h 35m
1 stop
RKS1:05 pmRock Springs Sweetwater County
Aug 18
RKS5:33 amRock Springs Sweetwater County
8h 48m
2 stops
IAD4:21 pmWashington, D.C. Dulles Intl

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. to Rock Springs that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated July 31, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Rock Springs that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Thu 8/14

6:30 am-1:05 pm

1 stop8h 35m

Rock Springs Sweetwater County

Mon 8/18

5:33 am-1:26 pm

1 stop5h 53m

$504

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Thu 8/14

6:30 am-1:05 pm

1 stop8h 35m

Rock Springs Sweetwater County

Mon 8/18

5:33 am-4:21 pm

2 stops8h 48m

$753

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Thu 8/14

6:35 am-1:05 pm

2 stops8h 30m

Rock Springs Sweetwater County

Mon 8/18

5:33 am-4:10 pm

2 stops8h 37m

$942

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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How to get the cheapest flight ticket from Washington, D.C. to Rock Springs

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest time of day to depart on your flight to Rock Springs?

In the evening is the cheapest time of day to fly from Washington, D.C. to Rock Springs when you can find flight prices for as low as $427. Flying to Rock Springs in the evening is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Rock Springs, so prices are often more expensive at around $637 per ticket.

When to book flights from Washington, D.C. to Rock Springs

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. to Rock Springs according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. to Rock Springs (WAS to RKS) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Rock Springs

Best Price Found

$504

Fastest flight time

8h 30m

Direct flights

None

Airports in Rock Springs

1 airport
The best flight deal from Washington, D.C. to Rock Springs found on momondo in the last 72 hours is $504
The fastest flight from Washington, D.C. to Rock Springs takes 8h 30m
There are no direct flights from Washington, D.C. to Rock Springs. Popular non-direct route for this connection is Washington, D.C. Dulles Intl Airport - Rock Springs Sweetwater County Airport.
There is 1 airport near Rock Springs: Rock Springs Sweetwater County (RKS)

  • How far is Washington, D.C. to Rock Springs Sweetwater County by plane?

    A flight from Washington, D.C. to Rock Springs Sweetwater County will travel around 1695.5 mi. By plane, this route typically takes 8h 30m.

  • When did momondo last update prices for flights from Washington, D.C. to Rock Springs Sweetwater County Airport?

    Prices for flights from Washington, D.C. to Rock Springs Sweetwater County Airport were last updated today.

  • How old do you have to be to fly from Washington, D.C. to Rock Springs Sweetwater County Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. to Rock Springs Sweetwater County Airport.

  • What documentation or ID do you need to fly to Rock Springs Sweetwater County Airport?

    The necessary travel and health documents for your Rock Springs Sweetwater County Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.


Traveling to a place near Rock Springs?

Book flights to Rock Springs if you plan to visit one of these locations
Green River

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To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Rock Springs from Washington, D.C..

Can I find flights from Washington, D.C. to Rock Springs with flexible booking policies on momondo?

Flights from Washington, D.C. to Rock Springs with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Washington, D.C. to Rock Springs?

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Tue 8/5
Tue 8/12

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