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$189+ Cheap flights from Rapid City to Ontario (RAP - ONT)

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 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ONT
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Rapid City to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Rapid City (RAP) to Ontario (ONT). 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

$339
(United Airlines)

One-way from

$189
(United Airlines)

Popular in

October

Cheapest in

August

Average price

$398
From Rapid City to Ontario
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One-way flight from Rapid City to Ontario
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Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Rapid City to Ontario

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

This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/308:30 amRAP - ONT
1 stop5h 21mUnited Airlines
Sat 10/45:05 amONT - RAP
1 stop6h 32mUnited Airlines
Deal found 9/11$354
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.
Sat 11/18:45 amRAP - ONT
1 stop4h 48mUnited Airlines
Mon 11/31:29 pmONT - RAP
1 stop4h 14mUnited Airlines
Deal found 9/10$379
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.
Thu 9/1812:43 pmRAP - ONT
1 stop5h 46mUnited Airlines
Mon 9/225:10 amONT - RAP
1 stop6h 28mUnited Airlines
Deal found 9/9$391
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:58 pmRAP - ONT
1 stop18h 49mMultiple Airlines
Thu 10/166:05 amONT - RAP
1 stop10h 03mMultiple Airlines
Deal found 9/10$403
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/235:00 pmRAP - ONT
1 stop6h 33mAmerican Airlines
Sat 9/2710:35 pmONT - RAP
1 stop11h 47mAmerican Airlines
Deal found 9/11$409
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.
Mon 9/295:50 pmRAP - ONT
1 stop20h 01mUnited Airlines
Sat 10/41:15 pmONT - RAP
1 stop26h 45mUnited Airlines
Deal found 9/10$446
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/911:15 amRAP - ONT
1 stop7h 08mUnited Airlines
Thu 10/161:15 pmONT - RAP
1 stop6h 19mUnited Airlines
Deal found 9/11$457
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/224:47 pmRAP - ONT
1 stop4h 56mUnited Airlines
Sat 9/279:36 amONT - RAP
2 stops11h 36mUnited Airlines
Deal found 9/11$464

Cheapflights Fare Finder

 
Customize your flight search to find flights from Rapid City to Ontario 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 Rapid City to Ontario that are best for you.

Fly from

Rapid City

Fly to

Ontario

Route

Depart

Return

Price

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Sat 2/28

7:05 am-12:33 pm

1 stop6h 28m

Ontario

Wed 3/4

1:00 pm-6:53 pm

1 stop4h 53m

$339

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Tue 9/30

8:30 am-12:51 pm

1 stop5h 21m

Ontario

Sat 10/4

5:05 am-12:37 pm

1 stop6h 32m

$354

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Sat 11/1

8:45 am-12:33 pm

1 stop4h 48m

Ontario

Mon 11/3

1:29 pm-6:43 pm

1 stop4h 14m

$379

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Thu 10/9

5:58 pm-11:47 am

1 stop18h 49m

Ontario

Thu 10/16

6:05 am-5:08 pm

1 stop10h 03m

$403

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Tue 9/23

5:00 pm-10:33 pm

1 stop6h 33m

Ontario

Sat 9/27

10:35 pm-11:22 am

1 stop11h 47m

$409

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Mon 9/29

5:50 pm-12:51 pm

1 stop20h 01m

Ontario

Sat 10/4

1:15 pm-5:00 pm

1 stop26h 45m

$446

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Thu 10/9

11:15 am-5:23 pm

1 stop7h 08m

Ontario

Thu 10/16

1:15 pm-8:34 pm

1 stop6h 19m

$457

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Mon 9/22

4:47 pm-8:43 pm

1 stop4h 56m

Ontario

Sat 9/27

9:36 am-10:12 pm

2 stops11h 36m

$464

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Tue 9/23

3:19 pm-8:43 pm

1 stop6h 24m

Ontario

Sat 9/27

1:15 pm-8:34 pm

1 stop6h 19m

$474

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Tue 10/7

11:15 am-3:02 pm

1 stop4h 47m

$189

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/9

Showing 1-10 of 18 results
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Best time to book a flight from Rapid City to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Rapid City to Ontario (average of $246). Flying from Rapid City to Ontario in March is currently the most expensive (average of $328). 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 Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated September 11, 2025.
Read reviews from past customers who have flown United Airlines from Rapid City to Ontario. 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.
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.
United Airlines
7.4
Good
8,937 reviews
United Airlines
7.4
Good
8,937 reviews

Entertainment

7.1

Boarding

7.7

Comfort

7.3

Crew

8.1

Overall

7.4

Food

6.6

Reviews

1 / 20
10.0
Excellent

Anonymous,Sep 2025

FRA - SFO

Lufthansa was amazing, I wish United States based airlines operated like them.

Related info for your journey

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

    For as low as $339, United Airlines can have you in Ontario from Rapid City in 6h 28m. The distance between Rapid City and Ontario is about 1038 mi.

  • What is the cheapest airline to fly from Rapid City to Ontario round-trip?

    According to our current data, United Airlines ($283), offers the cheapest pricing from Rapid City to Ontario. You may be able to fly from Rapid City to Ontario for 25% less than the average price by searching for this airline.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Rapid City to Ontario (average of $246). Flying from Rapid City to Ontario in March is currently the most expensive (average of $328). 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.

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Alternative routes for Rapid City to Ontario

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Top airline flying from Rapid City to Ontario

Discover the top airline that operate flights from Rapid City to Ontario. 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
United AirlinesCheapest$283Average$388FlexibilityNo cancel feeOn-time69%

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