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$138+ 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 8/3. Fares are subject to change and may not be available on all flights or dates of travel.
RAP — ONT
Jul 21 — Jul 281
Mon 7/21
Mon 7/28
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 July 16, 2025.

Round-trip from

$470
(United Airlines)

One-way from

$138
(Trip.com)

Popular in

July

Cheapest in

October

Average price

$596
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. 16% potential increase in price ($73 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 16, 2025.

This United Airlines deal was found by Cheapflights users on 7/15. 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 8/45:59 pmRAP - ONT
1 stop19h 33mUnited Airlines
Sat 8/95:05 amONT - RAP
1 stop15h 55mUnited Airlines
Deal found 7/15$470
This American Airlines deal was found by Cheapflights users on 7/15. 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.
Thu 7/245:36 amRAP - ONT
1 stop9h 11mAmerican Airlines
Thu 7/2410:28 pmONT - RAP
1 stop11h 21mAmerican Airlines
Deal found 7/15$561
This Delta deal was found by Cheapflights users on 7/15. 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 8/46:50 amRAP - ONT
2 stops11h 26mDelta
Sat 8/91:15 pmONT - RAP
2 stops8h 16mDelta
Deal found 7/15$580

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 July 16, 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

Mon 8/4

5:59 pm-12:32 pm

1 stop19h 33m

Ontario

Sat 8/9

5:05 am-10:00 pm

1 stop15h 55m

$470

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Mon 8/4

6:50 am-5:16 pm

2 stops11h 26m

Ontario

Sat 8/9

1:15 pm-10:31 pm

2 stops8h 16m

$580

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Sun 8/3

9:49 pm-8:52 pm

1 stop24h 03m

$138

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Thu 11/6

8:45 am-5:34 pm

2 stops9h 49m

$224

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Wed 7/23

11:19 am-9:38 pm

1 stop11h 19m

$286

Rapid CityOntario

RAP - ONT

RAPONT

Rapid City

Wed 7/23

2:25 pm-11:42 pm

2 stops10h 17m

$291

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/15

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 July 16, 2025.
Read reviews from past customers who have flown Delta, United Airlines, and American 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.
Delta
8.0
Very good
7,957 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

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
Delta
8.0
Very good
7,957 reviews
Delta
8.0
Very good
7,957 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

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
United Airlines
7.4
Good
8,863 reviews
Delta
8.0
Very good
7,957 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

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,957 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

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.

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

    According to our current data, United Airlines ($470), and Delta ($580) offers the cheapest pricing from Rapid City to Ontario.

  • What are the cheapest airlines to fly from Rapid City to Ontario one-way?

    To fly one-way, consider booking your trip with United Airlines, which is currently one of the cheapest options available, starting at $224. American Airlines flights start at $286 while deals on Delta start at $291 one-way.

  • 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 July 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$268Average$388FlexibilityNo cancel feeOn-time69%

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