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Cheap flights from Washington, D.C. to Rock Springs from $448

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 8/29. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. to Rock Springs

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
5:26 pm - 10:21 pm-
6h 55m
United Airlines Logo
2:35 pm - 11:19 pm-
6h 44m
$448United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:30 am - 2:00 pm-
7h 30m
United Airlines Logo
5:05 am - 3:12 pm-
8h 07m
$448United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:30 am - 2:00 pm-
7h 30m
United Airlines Logo
5:05 am - 6:42 pm-
11h 37m
$454United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
6:05 am - 2:00 pm-
9h 55m
United Airlines Logo
5:05 am - 6:42 pm-
11h 37m
$459United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
10:10 am - 2:00 pm-
5h 50m
United Airlines Logo
5:05 am - 9:13 pm-
14h 08m
$534United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:20 am - 10:21 pm-
16h 01m
United Airlines Logo
5:05 am - 7:14 am-
24h 09m
$585United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
8:20 am - 10:21 pm-
16h 01m
United Airlines Logo
5:05 am - 7:14 am-
24h 09m
$619United Airlines
Sat, Aug 29 - Tue, Sep 1
United Airlines Logo
10:33 pm - 10:21 pm-
25h 48m
United Airlines Logo
2:22 pm - 7:14 am-
14h 52m
$620United Airlines
Thu, Sep 24 - Tue, Sep 29
United Airlines Logo
10:33 pm - 10:21 pm-
25h 48m
United Airlines Logo
2:22 pm - 12:01 pm-
19h 39m
$627United Airlines
Thu, Sep 24 - Mon, Sep 28
United Airlines Logo
12:50 pm - 10:21 pm-
11h 31m
United Airlines Logo
2:35 pm - 7:14 am-
14h 39m
$632United Airlines
Sat, Aug 29 - Tue, Sep 1

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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 29
BWI8:30 amBaltimore/Washington
7h 30m
1 stop
RKS2:00 pmRock Springs Sweetwater County
Sep 1
RKS5:05 amRock Springs Sweetwater County
8h 07m
1 stop
BWI3:12 pmBaltimore/Washington
$448
United Airlines
Aug 29
BWI8:30 amBaltimore/Washington
7h 30m
1 stop
RKS2:00 pmRock Springs Sweetwater County
Sep 1
RKS5:05 amRock Springs Sweetwater County
11h 37m
2 stops
BWI6:42 pmBaltimore/Washington
$454
United Airlines
Aug 29
BWI6:05 amBaltimore/Washington
9h 55m
2 stops
RKS2:00 pmRock Springs Sweetwater County
Sep 1
RKS5:05 amRock Springs Sweetwater County
11h 37m
2 stops
BWI6:42 pmBaltimore/Washington
$459

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 August 5, 2026.
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

Cheapest round-trip
Quickest round-trip

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Sat 8/29

5:26 pm-10:21 pm

1 stop6h 55m

Rock Springs Sweetwater County

Tue 9/1

2:35 pm-11:19 pm

1 stop6h 44m

$448

BaltimoreRock Springs

BWI - RKS

BWIRKS

Baltimore/Washington

Sat 8/29

8:30 am-2:00 pm

1 stop7h 30m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-3:12 pm

1 stop8h 07m

$448

BaltimoreRock Springs

BWI - RKS

BWIRKS

Baltimore/Washington

Sat 8/29

8:30 am-2:00 pm

1 stop7h 30m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-6:42 pm

2 stops11h 37m

$454

BaltimoreRock Springs

BWI - RKS

BWIRKS

Baltimore/Washington

Sat 8/29

6:05 am-2:00 pm

2 stops9h 55m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-6:42 pm

2 stops11h 37m

$459

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Sat 8/29

10:10 am-2:00 pm

1 stop5h 50m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-9:13 pm

2 stops14h 08m

$534

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Sat 8/29

8:20 am-10:21 pm

2 stops16h 01m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-7:14 am

2 stops24h 09m

$585

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Sat 8/29

8:20 am-10:21 pm

2 stops16h 01m

Rock Springs Sweetwater County

Tue 9/1

5:05 am-7:14 am

2 stops24h 09m

$619

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Thu 9/24

10:33 pm-10:21 pm

2 stops25h 48m

Rock Springs Sweetwater County

Tue 9/29

2:22 pm-7:14 am

2 stops14h 52m

$620

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Thu 9/24

10:33 pm-10:21 pm

2 stops25h 48m

Rock Springs Sweetwater County

Mon 9/28

2:22 pm-12:01 pm

2 stops19h 39m

$627

Washington, D.C.Rock Springs

IAD - RKS

IADRKS

Washington, D.C. Dulles Intl

Sat 8/29

12:50 pm-10:21 pm

1 stop11h 31m

Rock Springs Sweetwater County

Tue 9/1

2:35 pm-7:14 am

2 stops14h 39m

$632

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Rock Springs from

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

How long does it take to fly to Rock Springs?

Flight times from Washington, D.C. to Rock Springs vary, but if you’re flying out of Baltimore and flying into Rock Springs (one of the most popular routes), then the duration is 7h 17m on average. Another popular route from Washington, D.C. to Rock Springs is flying from Washington, D.C. to Rock Springs, which will take roughly 7h 24m. Keep in mind that layovers or delays could extend your travel time.

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

Fastest flight time

6h 55m

Direct flights

None
The fastest flight from Washington, D.C. to Rock Springs takes 6h 55m
There are no direct flights from Washington, D.C. to Rock Springs. There are no popular flight routes from Washington, D.C. to Rock Springs.
Search flight deals

Frequently asked questions about flying from Washington, D.C. to Rock Springs

  • 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 6h 55m.

  • 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

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to Rock Springs?

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?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to Rock Springs.

I’m not ready to book a flight from Washington, D.C. to Rock Springs right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Rock Springs from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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