What is the cheapest airline that flies from Rapid City to Washington?

Allegiant Air, United Airlines, and Delta are the most popular carriers operating from Rapid City to Washington

When did momondo last update prices for flights from Rapid City Airport to Washington?

Prices for flights from Rapid City Airport to Washington are refreshed on a daily basis.

How many operators does momondo search for flights from Rapid City Airport to Washington?

As of August 2026, there are 2 operators available to choose from for flights from Rapid City Airport to Washington.

How old do you have to be to fly from Rapid City Airport to Washington?

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 Rapid City Airport to Washington.

What documentation or ID do you need to fly to Washington?

The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$170 Cheap Flights from Rapid City to Washington in 2026

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Rapid City to Washington

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

5:48 pm - 10:53 pmRAP Rapid City-PDX Portland

6h 05m1 stop Denver Intl

5:00 am - 11:55 amPDX Portland-RAP Rapid City

5h 55m1 stop Denver Intl

$329United Airlines

Wed, Sep 16 - Sun, Sep 20

5:00 am - 9:32 amRAP Rapid City-PDX Portland

5h 32m1 stop Denver Intl

5:00 am - 12:24 pmPDX Portland-RAP Rapid City

6h 24m1 stop Denver Intl

$329United Airlines

Sun, Aug 30 - Sun, Sep 6

5:48 pm - 11:04 pmRAP Rapid City-SEA Seattle/Tacoma Intl

6h 16m1 stop Denver Intl

5:00 am - 11:55 amSEA Seattle/Tacoma Intl-RAP Rapid City

5h 55m1 stop Denver Intl

$329United Airlines

Fri, Sep 18 - Sun, Sep 20

3:34 pm - 9:19 amRAP Rapid City-SEA Seattle/Tacoma Intl

18h 45m2 stops Las Vegas Harry Reid Intl Denver Intl

9:45 pm - 11:46 amSEA Seattle/Tacoma Intl-RAP Rapid City

13h 01m1 stop Las Vegas Harry Reid Intl

$346Multiple Airlines

Sun, Sep 6 - Wed, Sep 9

12:39 pm - 6:59 pmRAP Rapid City-PDX Portland

7h 20m1 stop Dallas/Fort Worth

5:15 am - 12:08 pmPDX Portland-RAP Rapid City

5h 53m1 stop Phoenix Sky Harbor Intl

$354American Airlines

Fri, Aug 21 - Tue, Aug 25

11:45 am - 4:51 pmRAP Rapid City-PDX Portland

6h 06m1 stop Phoenix Sky Harbor Intl

5:15 am - 12:08 pmPDX Portland-RAP Rapid City

5h 53m1 stop Phoenix Sky Harbor Intl

$354American Airlines

Fri, Aug 21 - Tue, Aug 25

7:00 am - 11:44 amRAP Rapid City-SEA Seattle/Tacoma Intl

5h 44m1 stop Denver Intl

5:00 am - 12:24 pmSEA Seattle/Tacoma Intl-RAP Rapid City

6h 24m1 stop Denver Intl

$358United Airlines

Sun, Aug 30 - Sun, Sep 6

2:32 pm - 8:50 pmRAP Rapid City-SEA Seattle/Tacoma Intl

7h 18m1 stop Minneapolis St Paul

11:59 pm - 10:02 amSEA Seattle/Tacoma Intl-RAP Rapid City

9h 03m1 stop Minneapolis St Paul

$379Delta

Thu, Aug 20 - Fri, Aug 28

4:31 pm - 11:55 pmRAP Rapid City-SEA Seattle/Tacoma Intl

8h 24m1 stop Minneapolis St Paul

11:59 pm - 10:01 amSEA Seattle/Tacoma Intl-RAP Rapid City

9h 02m1 stop Minneapolis St Paul

$384Delta

Fri, Sep 11 - Sat, Sep 19

6:48 am - 1:38 pmRAP Rapid City-PDX Portland

7h 50m1 stop Minneapolis St Paul

12:25 am - 10:02 amPDX Portland-RAP Rapid City

8h 37m1 stop Minneapolis St Paul

$484Delta

Tue, Sep 1 - Mon, Sep 7

Cheap last minute flights

Enter your travel dates to find the best prices.

3:31 pm - 9:05 pmRAP Rapid City-GEG Spokane

6h 34m1 stop Denver Intl

5:00 am - 12:24 pmGEG Spokane-RAP Rapid City

6h 24m1 stop Denver Intl

$424United Airlines

Mon, Aug 10 - Mon, Aug 17

12:31 pm - 5:46 pmRAP Rapid City-PDX Portland

6h 15m1 stop Denver Intl

5:00 am - 12:24 pmPDX Portland-RAP Rapid City

6h 24m1 stop Denver Intl

$451United Airlines

Sat, Aug 8 - Wed, Aug 12

3:31 pm - 10:48 pmRAP Rapid City-PDX Portland

8h 17m2 stops Denver Intl San Francisco

5:00 am - 11:55 amPDX Portland-RAP Rapid City

5h 55m1 stop Denver Intl

$472United Airlines

Sat, Aug 8 - Wed, Aug 12

7:00 am - 11:44 amRAP Rapid City-SEA Seattle/Tacoma Intl

5h 44m1 stop Denver Intl

5:00 am - 11:55 amSEA Seattle/Tacoma Intl-RAP Rapid City

5h 55m1 stop Denver Intl

$479United Airlines

Tue, Aug 11 - Sat, Aug 29

3:36 pm - 6:08 pmRAP Rapid City-PDX Portland

27h 32m1 stop Phoenix-Mesa Gateway

5:56 pm - 3:55 pmPDX Portland-RAP Rapid City

20h 59m2 stops Denver Intl Las Vegas Harry Reid Intl

$510Multiple Airlines

Wed, Aug 12 - Wed, Aug 19

10:06 pm - 4:31 pmRAP Rapid City-PDX Portland

43h 25m2 stops Las Vegas Harry Reid Intl Denver Intl

6:58 pm - 9:11 pmPDX Portland-RAP Rapid City

25h 13m1 stop Phoenix-Mesa Gateway

$617Multiple Airlines

Sun, Aug 9 - Thu, Aug 13

10:06 pm - 4:54 pmRAP Rapid City-PDX Portland

19h 48m1 stop Las Vegas Harry Reid Intl

6:58 pm - 9:11 pmPDX Portland-RAP Rapid City

25h 13m1 stop Phoenix-Mesa Gateway

$691Multiple Airlines

Sun, Aug 9 - Thu, Aug 13

2:32 pm - 11:53 pmRAP Rapid City-GEG Spokane

10h 21m2 stops Minneapolis St Paul Salt Lake City

6:45 am - 3:49 pmGEG Spokane-RAP Rapid City

8h 04m1 stop Minneapolis St Paul

$713Delta

Mon, Aug 10 - Mon, Aug 17

2:32 pm - 11:53 pmRAP Rapid City-GEG Spokane

10h 21m2 stops Minneapolis St Paul Salt Lake City

7:54 pm - 10:02 amGEG Spokane-RAP Rapid City

13h 08m2 stops Seattle/Tacoma Intl Minneapolis St Paul

$888Delta

Mon, Aug 10 - Mon, Aug 17

6:48 am - 4:54 pmRAP Rapid City-SEA Seattle/Tacoma Intl

11h 06m2 stops Minneapolis St Paul Salt Lake City

1:25 pm - 10:37 pmSEA Seattle/Tacoma Intl-RAP Rapid City

8h 12m2 stops Salt Lake City Minneapolis St Paul

$4,084Delta

Wed, Aug 12 - Fri, Aug 21

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United Airlines flights from Rapid City to State of Washington

Our best United Airlines deals on Rapid City to State of Washington flight tickets

United Airlines

Sep 18

RAP5:48 pmRapid City

6h 16m

1 stop

SEA11:04 pmSeattle/Tacoma Intl

Sep 20

SEA5:00 amSeattle/Tacoma Intl

5h 55m

1 stop

RAP11:55 amRapid City

$329

United Airlines

Aug 30

RAP7:00 amRapid City

5h 44m

1 stop

SEA11:44 amSeattle/Tacoma Intl

Sep 6

SEA5:00 amSeattle/Tacoma Intl

6h 24m

1 stop

RAP12:24 pmRapid City

$358

United Airlines

Sep 16

RAP5:48 pmRapid City

6h 05m

1 stop

PDX10:53 pmPortland

Sep 23

PDX5:00 amPortland

5h 55m

1 stop

RAP11:55 amRapid City

$377

Delta flights from Rapid City to State of Washington

Our best Delta deals on Rapid City to State of Washington flight tickets

Delta

Aug 20

RAP2:32 pmRapid City

7h 18m

1 stop

SEA8:50 pmSeattle/Tacoma Intl

Aug 28

SEA11:59 pmSeattle/Tacoma Intl

9h 03m

1 stop

RAP10:02 amRapid City

$379

Delta

Sep 11

RAP4:31 pmRapid City

8h 24m

1 stop

SEA11:55 pmSeattle/Tacoma Intl

Sep 19

SEA11:59 pmSeattle/Tacoma Intl

9h 02m

1 stop

RAP10:01 amRapid City

$384

Delta

Sep 1

RAP6:48 amRapid City

7h 50m

1 stop

PDX1:38 pmPortland

Sep 7

PDX12:25 amPortland

8h 37m

1 stop

RAP10:02 amRapid City

$484

momondo Fare Finder

Use the filters below to find and compare flights from Rapid City to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Rapid CityPortland

RAP Rapid City - PDX Portland

RAPPDX

Rapid City

Wed 9/16

5:48 pm-10:53 pm

1 stop6h 05m

Portland

Sun 9/20

5:00 am-11:55 am

1 stop5h 55m

$329

Quickest round-trip

Rapid CityPortland

RAP Rapid City - PDX Portland

RAPPDX

Rapid City

Sun 8/30

5:00 am-9:32 am

1 stop5h 32m

Portland

Sun 9/6

5:00 am-12:24 pm

1 stop6h 24m

$329

Rapid CitySeattle

RAP Rapid City - SEA Seattle/Tacoma Intl

RAPSEA

Rapid City

Fri 9/18

5:48 pm-11:04 pm

1 stop6h 16m

Seattle/Tacoma Intl

Sun 9/20

5:00 am-11:55 am

1 stop5h 55m

$329

Rapid CitySeattle

RAP Rapid City - SEA Seattle/Tacoma Intl

RAPSEA

Rapid City

Sun 9/6

3:34 pm-9:19 am

2 stops18h 45m

Seattle/Tacoma Intl

Wed 9/9

9:45 pm-11:46 am

1 stop13h 01m

$346

Rapid CityPortland

RAP Rapid City - PDX Portland

RAPPDX

Rapid City

Fri 8/21

12:39 pm-6:59 pm

1 stop7h 20m

Portland

Tue 8/25

5:15 am-12:08 pm

1 stop5h 53m

$354

Rapid CityPortland

RAP Rapid City - PDX Portland

RAPPDX

Rapid City

Fri 8/21

11:45 am-4:51 pm

1 stop6h 06m

Portland

Tue 8/25

5:15 am-12:08 pm

1 stop5h 53m

$354

Rapid CitySeattle

RAP Rapid City - SEA Seattle/Tacoma Intl

RAPSEA

Rapid City

Sun 8/30

7:00 am-11:44 am

1 stop5h 44m

Seattle/Tacoma Intl

Sun 9/6

5:00 am-12:24 pm

1 stop6h 24m

$358

Rapid CitySeattle

RAP Rapid City - SEA Seattle/Tacoma Intl

RAPSEA

Rapid City

Thu 8/20

2:32 pm-8:50 pm

1 stop7h 18m

Seattle/Tacoma Intl

Fri 8/28

11:59 pm-10:02 am

1 stop9h 03m

$379

Rapid CitySeattle

RAP Rapid City - SEA Seattle/Tacoma Intl

RAPSEA

Rapid City

Fri 9/11

4:31 pm-11:55 pm

1 stop8h 24m

Seattle/Tacoma Intl

Sat 9/19

11:59 pm-10:01 am

1 stop9h 02m

$384

Rapid CityPortland

RAP Rapid City - PDX Portland

RAPPDX

Rapid City

Tue 9/1

6:48 am-1:38 pm

1 stop7h 50m

Portland

Mon 9/7

12:25 am-10:02 am

1 stop8h 37m

$484

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Rapid City to State of Washington

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

Prices

Airlines

What is the cheapest month to fly to State of Washington?

The month of February is, on average, the cheapest month to fly to State of Washington from Rapid City, with most prices found around $298. If you aren’t able to travel to State of Washington during the month of February, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $319.

Can stopping save me money on Rapid City to State of Washington flights?

You could potentially save up to 6% on your flight if you consider stops on a Rapid City to State of Washington flight.

Cheap Rapid City to State of Washington flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Rapid City to State of Washington

Fastest flight time	4h 40m
Direct flights	None

The fastest flight from Rapid City to State of Washington takes 4h 40m

There are no direct flights from Rapid City to State of Washington. There are no popular flight routes from Rapid City to State of Washington.

Search flight deals

Frequently asked questions about flying from Rapid City to Washington

When did momondo last update prices for flights from Rapid City Airport to Washington?
Prices for flights from Rapid City Airport to Washington are refreshed on a daily basis.
How many operators does momondo search for flights from Rapid City Airport to Washington?
As of August 2026, there are 2 operators available to choose from for flights from Rapid City Airport to Washington.
How old do you have to be to fly from Rapid City Airport to Washington?
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 Rapid City Airport to Washington.
What documentation or ID do you need to fly to Washington?
The travel and health documents required for your trip to Washington can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Rapid City to State of Washington

Compare and see reviews for airlines that fly from Rapid City to State of Washington with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $244	Free Cancellation	Rating 7.4 10,074 reviews		Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Rapid City to Washington?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Rapid City to Washington. momondo saves you time and could save you money on your trip.

Can I find flights from Rapid City to Washington with flexible booking policies on momondo?

momondo does allow users to show only those flights to Washington from Rapid City which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Rapid City to Washington?

Once you have performed a search for Rapid City to Washington flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Rapid City to Washington right now. Can momondo alert me if prices change?

Price alerts on flights to Washington from Rapid City are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.