HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Rapid City

$166+ Cheap flights from Portland to Rapid City (PDX - RAP)

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 9/22. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — RAP
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Portland to Rapid City with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Portland to Rapid City are usually found in April or January, booked 61 days in advance, depart on a Thursday or Saturday and return on a Thursday

Cheap flight deals from Portland to Rapid City

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Rapid City (RAP). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 11, 2025.

Round-trip from

$259
(Delta)

One-way from

$166
(Kiwi.com)

Popular in

July

Cheapest in

April

Average price

$408
From Portland to Rapid City
Search Deals
One-way flight from Portland to Rapid City
Search Deals
Highest demand for flights based on searches. 14% potential increase in price ($68 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Portland to Rapid City

Cheapest flights from Portland to Rapid City
Explore the most affordable flight options available from Portland to Rapid City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/2412:40 amPDX - RAP
1 stop8h 13mDelta
Wed 11/56:05 amRAP - PDX
1 stop7h 45mDelta
Deal found 9/11$259
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:25 pmPDX - RAP
2 stops8h 11mDelta
Mon 11/102:51 pmRAP - PDX
1 stop6h 56mDelta
Deal found 9/11$264
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/311:25 pmPDX - RAP
2 stops8h 11mDelta
Sat 11/810:33 amRAP - PDX
2 stops11h 18mDelta
Deal found 9/11$269
This United Airlines deal was found by Cheapflights users on 9/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/244:07 pmPDX - RAP
1 stop4h 52mUnited Airlines
Wed 10/112:56 pmRAP - PDX
1 stop5h 25mUnited Airlines
Deal found 9/9$274
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/17:30 amPDX - RAP
2 stops8h 30mUnited Airlines
Mon 10/612:56 pmRAP - PDX
1 stop5h 25mUnited Airlines
Deal found 9/10$287
This United Airlines deal was found by Cheapflights users on 9/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/254:07 pmPDX - RAP
1 stop5h 05mUnited Airlines
Mon 9/295:50 pmRAP - PDX
1 stop5h 55mUnited Airlines
Deal found 9/10$289
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/295:30 amPDX - RAP
2 stops16h 06mDelta
Wed 11/56:05 amRAP - PDX
1 stop7h 45mDelta
Deal found 9/11$307
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:40 amPDX - RAP
1 stop8h 13mDelta
Mon 11/102:51 pmRAP - PDX
1 stop6h 56mDelta
Deal found 9/11$309
This Delta deal was found by Cheapflights users on 9/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/255:25 pmPDX - RAP
2 stops15h 28mDelta
Sat 11/810:33 amRAP - PDX
2 stops11h 18mDelta
Deal found 9/11$312

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Rapid City 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, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
Use the filters below to find and compare flights from Portland to Rapid City that are best for you.

Fly from

Portland

Fly to

Rapid City

Route

Depart

Return

Price

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Fri 10/24

12:40 am-9:53 am

1 stop8h 13m

Rapid City

Wed 10/29

6:05 am-12:50 pm

1 stop7h 45m

$259

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Fri 10/31

1:55 pm-10:36 pm

1 stop7h 41m

Rapid City

Sun 11/9

2:51 pm-8:47 pm

1 stop6h 56m

$259

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Fri 10/24

12:40 am-9:53 am

1 stop8h 13m

Rapid City

Sat 11/8

2:25 pm-8:26 pm

1 stop7h 01m

$259

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Sat 10/25

12:40 am-9:53 am

1 stop8h 13m

Rapid City

Sat 11/8

10:33 am-8:51 pm

2 stops11h 18m

$264

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Wed 9/24

4:07 pm-9:59 pm

1 stop4h 52m

Rapid City

Wed 10/1

4:35 pm-9:06 pm

1 stop5h 31m

$288

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Mon 10/27

12:40 am-9:53 am

1 stop8h 13m

Rapid City

Wed 11/5

6:05 am-12:50 pm

1 stop7h 45m

$309

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Mon 10/27

12:40 am-9:53 am

1 stop8h 13m

Rapid City

Sat 11/8

10:33 am-5:27 pm

1 stop7h 54m

$309

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Mon 10/27

7:59 pm-9:53 am

2 stops12h 54m

Rapid City

Wed 11/5

10:33 am-5:27 pm

1 stop7h 54m

$314

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Thu 10/30

6:00 am-9:59 pm

3 stops14h 59m

Rapid City

Sun 11/2

8:45 am-1:47 pm

1 stop6h 02m

$339

PortlandRapid City

PDX - RAP

PDXRAP

Portland

Fri 10/31

1:55 pm-10:36 pm

1 stop7h 41m

Rapid City

Thu 11/6

10:33 am-5:27 pm

1 stop7h 54m

$343

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Showing 1-10 of 19 results
1
2

Best time to book a flight from Portland to Rapid City

Have a flexible travel schedule? Discover the best time to fly to Rapid City from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Rapid City

How far ahead should I book a flight from Portland to Rapid City?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Rapid City. Price data was last updated on August 29, 2025.

The price you pay for your flight from Portland to Rapid City may vary depending on when you book. For the best chance of a lower fare, look to book 61 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Portland to Rapid City?

Currently, January is the cheapest month in which you can book a flight from Portland to Rapid City (average of $348). Flying from Portland to Rapid City in June is currently the most expensive (average of $502). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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

Find hourly flight availability from Portland to Rapid City. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 28% on flights from Portland to Rapid City by exploring options for tickets in the evening.

How much does it cost to fly round-trip from Portland to Rapid City?

Reviews of airlines servicing Rapid City

Get insights into the airlines that provide service to Rapid City. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Rapid City. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown Delta and United Airlines from Portland to Rapid City. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,960 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,937 reviews
Delta
8.0
Very good
7,960 reviews

Comfort

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

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

  • How long is the flight from Portland to Rapid City?

    Airlines like Delta fly from Portland to Rapid City in about 8h 13m. The time it takes to get you to your destination can typically vary by up to . The distance between Portland and Rapid City is about 960 mi.

  • What are the cheapest airlines flying from Portland to Rapid City round-trip?

    Cheapflights users have booked flights from Portland to Rapid City round-trip from $258. Another airline that can offer you cheap pricing is United Airlines. Delta is 37% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Portland to Rapid City that include hotel bookings?

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

  • How can I find direct flights from Portland to Rapid City?

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

  • Can I find deals for business class flights from Portland to Rapid City?

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

  • What is the cheapest month to book a flight from Portland to Rapid City?

    Currently, January is the cheapest month in which you can book a flight from Portland to Rapid City (average of $348). Flying from Portland to Rapid City in June is currently the most expensive (average of $502). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Rapid City?

Book flights to Rapid City if you plan to visit one of these locations
Deadwood
Keystone
Sturgis
Spearfish

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.

Top 2 airlines flying from Portland to Rapid City

Discover the top 2 airlines that operate flights from Portland to Rapid City. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$258Average$373FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$306Average$418FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.