HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Rapid City

$241+ Cheap flights from Ontario to Rapid City (ONT - 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 4/28. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — RAP
Apr 15 — Apr 221
Wed 4/15
Wed 4/22
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ontario 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.

Cheap flight deals from Ontario to Rapid City

Cheapest flights from Ontario to Rapid City
Explore the most affordable flight options available from Ontario to Rapid City. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 16, 2026.

This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/91:34 pm
ONT
-
RAP
1 stop6h 10m
United Airlines
Mon 4/132:47 pm
RAP
-
ONT
1 stop6h 49m
United Airlines
Deal found 3/11$319
This United Airlines deal was found by Cheapflights users on 3/14. 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 6/101:18 pm
ONT
-
RAP
1 stop4h 55m
United Airlines
Tue 6/165:00 am
RAP
-
ONT
2 stops8h 12m
United Airlines
Deal found 3/14$344
This United Airlines deal was found by Cheapflights users on 3/14. 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.
Tue 5/195:00 am
ONT
-
RAP
1 stop7h 09m
United Airlines
Sun 5/2411:20 am
RAP
-
ONT
1 stop7h 08m
United Airlines
Deal found 3/14$363
This United Airlines deal was found by Cheapflights users on 3/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/255:00 am
ONT
-
RAP
1 stop5h 30m
United Airlines
Tue 6/307:00 am
RAP
-
ONT
1 stop6h 47m
United Airlines
Deal found 3/11$372
This United Airlines deal was found by Cheapflights users on 3/12. 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 4/151:34 pm
ONT
-
RAP
1 stop6h 10m
United Airlines
Sat 4/184:15 pm
RAP
-
ONT
1 stop5h 21m
United Airlines
Deal found 3/12$399
This Kiwi.com deal was found by Cheapflights users on 3/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/210:07 am
ONT
-
RAP
1 stop9h 53m
Multiple Airlines
Sun 7/59:50 pm
RAP
-
ONT
1 stop12h 17m
Multiple Airlines
Deal found 3/13$407

Find flight deals from Ontario to Rapid City

Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) 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 March 16, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$319
(United Airlines)

One-way from

$241
(American Airlines)

Popular in

January

Cheapest in

October

Average price

$453
Provider with most accurate pricing for Ontario-Rapid City flight deals.
Search Deals
Provider most trusted by Cheapflights users for Ontario-Rapid City flights.
Search Deals
From Ontario to Rapid City
Search Deals
One-way flight from Ontario to Rapid City
Search Deals
High demand for flights, 0% potential price rise
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($5 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Ontario 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 March 16, 2026.
Use the filters below to find and compare flights from Ontario to Rapid City that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Tue 5/19

5:00 am-1:09 pm

1 stop7h 09m

Rapid City

Sun 5/24

5:00 am-12:12 pm

2 stops8h 12m

$368

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Thu 6/25

5:00 am-11:30 am

1 stop5h 30m

Rapid City

Tue 6/30

5:00 am-12:12 pm

2 stops8h 12m

$377
Quickest round-trip

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Wed 4/15

1:34 pm-8:44 pm

1 stop6h 10m

Rapid City

Sat 4/18

8:30 am-12:38 pm

1 stop5h 08m

$399

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Mon 4/13

5:10 am-11:24 am

1 stop5h 14m

Rapid City

Wed 4/15

2:47 pm-8:36 pm

1 stop6h 49m

$411

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Sat 5/2

1:40 pm-8:28 pm

1 stop5h 48m

Rapid City

Wed 5/6

2:35 pm-8:36 pm

1 stop7h 01m

$419
Cheapest one-way

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Tue 4/28

6:15 am-4:27 pm

2 stops9h 12m

$241

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Fri 5/8

6:00 am-4:27 pm

1 stop9h 27m

$286

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Fri 5/8

1:29 pm-10:23 pm

2 stops7h 54m

$311

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Sun 3/29

5:10 am-1:08 pm

1 stop6h 58m

$316
Quickest one-way

OntarioRapid City

ONT - RAP

ONTRAP

Ontario

Sat 6/27

1:18 pm-7:24 pm

1 stop5h 06m

$336

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/11

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Compare providers for flights from Ontario to Rapid City

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Rapid City in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Ontario-Rapid City flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Rapid City flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Rapid City flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Ontario-Rapid City flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Rapid City flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Ontario to Rapid City

Have a flexible travel schedule? Discover the best time to fly to Rapid City from Ontario 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 Ontario to Rapid City

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

Currently, August is the cheapest month in which you can book a flight from Ontario to Rapid City (average of $217). Flying from Ontario to Rapid City in April is currently the most expensive (average of $298). 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.

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 March 16, 2026.
See what other customers who have flown with United Airlines and American Airlines from Ontario to Rapid City have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,428 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.
United Airlines
7.4
Good
9,428 reviews
United Airlines
7.4
Good
9,428 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.
American Airlines
7.1
Good
11,467 reviews
United Airlines
7.4
Good
9,428 reviews

Comfort

7.3

Boarding

7.7

Entertainment

7.1

Food

6.6

Crew

8.1

Overall

7.4

Reviews

1 / 20
10.0
Excellent

Kathy,Jun 2024

RDD - SFO

United has consistently been good. Every now and then there is a crew member that should probably retire, but most of them are excellent.

Related info for your journey

Find useful and relevant information for your journey from Ontario 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 Ontario to Rapid City?

    A quick flight from Ontario to Rapid City can take about 5h 30m. United Airlines provides one of the quickest options available for as low as $377. The distance from Ontario to Rapid City is about 1038 mi.

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

    Cheapflights users have booked flights from Ontario to Rapid City round-trip from $258. Another airline that can offer you cheap pricing is United Airlines. Users have found that American Airlines is 41% cheaper than the other options available to this destination.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Ontario 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 Ontario to Rapid City?

    Currently, August is the cheapest month in which you can book a flight from Ontario to Rapid City (average of $217). Flying from Ontario to Rapid City in April is currently the most expensive (average of $298). 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
Keystone
Deadwood
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 Ontario to Rapid City

Discover the top 2 airlines that operate flights from Ontario 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 March 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$258Average$496FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$258Average$398FlexibilityNo 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.