What is the cheapest airline to fly from Ontario to Montrose round-trip?

Flying on Southwest is currently your cheapest option to Montrose, with prices starting at $366.

What is the cheapest day to fly from Ontario to Montrose?

Travelers seeking maximum savings on their Ontario to Montrose flight should consider departing on Monday mornings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Montrose ranges from 0.4 - 1.2 inches per month. August is typically the wettest month, when rainfall can reach 1.2 in. January is typically the driest time to visit Montrose when rainfall is around 0.4 in.

If weather is an important factor for your trip to Montrose, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 24.8 F).

What is the cheapest day to fly round-trip from Ontario to Montrose?

Saturday flights are generally found to be more expensive for flights from Ontario to Montrose. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Montrose.

How far in advance should I book a flight from Ontario to Montrose?

To save on the cost of your flight from Ontario to Montrose, book at least 39 days before your planned departure. Booking around this time can save you about 60% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $369 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $488.

What is the cheapest month to fly from Ontario to Montrose?

Due to multiple factors, expect to potentially pay more when booking in November. For low rates, April can be a great choice for travel to Montrose. Flights to Montrose from Ontario in April are about $488 on average during April, but can be found for as low as $288.

What is the cheapest time of day to fly from ONT to MTJ?

Unlike at noon, when flights are generally more expensive, you can save up to 12% on flights from Ontario to Montrose by exploring options for tickets in the morning.

Can I find deals for flights from Ontario to Montrose that include hotel bookings?

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

How can I find direct flights from Ontario to Montrose?

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

Can I find deals for business class flights from Ontario to Montrose?

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

$221+ Cheap Flights from Ontario to Montrose

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Cheap flight deals from Ontario to Montrose

Round-trip from	$319 (United Airlines)
One-way from	$221 (United Airlines)
Popular in	November
Cheapest in	April
Average price	$580

From Ontario to Montrose County

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One-way flight from Ontario to Montrose County

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Highest demand for flights based on searches. 18% potential increase in price ($113 potential increase over avg. RT price).

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Cheapest flight prices on average. 8% potential price decrease ($37 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Ontario to Montrose

Cheapest flights from Ontario to Montrose
Explore the most affordable flight options available from Ontario to Montrose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Sat 9/135:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$319

Mon 9/15:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Fri 9/51:43 pmMTJ - ONT

1 stop4h 46mUnited Airlines

Deal found 8/15

$341

Tue 10/141:15 pmONT - MTJ

1 stop6h 04mUnited Airlines

Sat 10/183:25 pmMTJ - ONT

1 stop5h 59mUnited Airlines

Deal found 8/14

$359

Fri 8/291:15 pmONT - MTJ

1 stop6h 07mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$400

Sun 10/55:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Sat 10/113:25 pmMTJ - ONT

1 stop5h 59mUnited Airlines

Deal found 8/15

$407

Wed 8/205:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Tue 8/267:30 amMTJ - ONT

1 stop6h 02mUnited Airlines

Deal found 8/15

$511

Fri 11/75:05 amONT - MTJ

1 stop6h 24mUnited Airlines

Tue 11/117:15 amMTJ - ONT

2 stops11h 19mUnited Airlines

Deal found 8/15

$548

Fri 9/265:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Mon 9/297:30 amMTJ - ONT

1 stop6h 21mUnited Airlines

Deal found 8/15

$552

Best flights from Ontario to Montrose
Discover carefully curated flight deals from Ontario to Montrose that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 16, 2025.

Sat 9/135:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$319

Mon 9/15:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Fri 9/51:43 pmMTJ - ONT

1 stop4h 46mUnited Airlines

Deal found 8/15

$341

Tue 10/141:15 pmONT - MTJ

1 stop6h 04mUnited Airlines

Sat 10/183:25 pmMTJ - ONT

1 stop5h 59mUnited Airlines

Deal found 8/14

$359

Fri 8/291:15 pmONT - MTJ

1 stop6h 07mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$400

Sun 10/55:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Sat 10/113:25 pmMTJ - ONT

1 stop5h 59mUnited Airlines

Deal found 8/15

$407

Fri 11/75:05 amONT - MTJ

1 stop6h 24mUnited Airlines

Tue 11/117:15 amMTJ - ONT

2 stops11h 19mUnited Airlines

Deal found 8/15

$548

Fri 9/265:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Mon 9/297:30 amMTJ - ONT

1 stop6h 21mUnited Airlines

Deal found 8/15

$552

Last-minute flights from Ontario to Montrose
Discover last-minute flight deals from Ontario to Montrose. Data last updated August 16, 2025 and is based on user searches.

Wed 8/205:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Tue 8/267:30 amMTJ - ONT

1 stop6h 02mUnited Airlines

Deal found 8/15

$511

Thu 8/215:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Sun 8/247:30 amMTJ - ONT

1 stop14h 13mUnited Airlines

Deal found 8/14

$833

Fri 8/291:15 pmONT - MTJ

1 stop6h 07mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$400

Mon 9/15:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Fri 9/51:43 pmMTJ - ONT

1 stop4h 46mUnited Airlines

Deal found 8/15

$341

Sat 9/135:10 amONT - MTJ

1 stop6h 37mUnited Airlines

Sat 9/203:24 pmMTJ - ONT

1 stop6h 19mUnited Airlines

Deal found 8/15

$319

Fri 9/265:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Mon 9/297:30 amMTJ - ONT

1 stop6h 21mUnited Airlines

Deal found 8/15

$552

One-way flights from Ontario to Montrose
Search for one-way flight options from Ontario to Montrose. Find affordable one-way fares based on user searches. Data last updated August 16, 2025.

Wed 10/15:05 amONT - MTJ

1 stop6h 41mUnited Airlines

Deal found 8/15

$221

Wed 12/176:41 pmONT - MTJ

1 stop19h 37mUnited Airlines

Deal found 8/14

$248

Fri 10/106:27 pmONT - MTJ

1 stop19h 02mUnited Airlines

Deal found 8/14

$259

Tue 12/161:33 pmONT - MTJ

2 stops20h 51mAmerican Airlines

Deal found 8/14

$267

Sat 12/205:40 amONT - MTJ

1 stop6h 01mUnited Airlines

Deal found 8/14

$301

Thu 12/1810:42 amONT - MTJ

2 stops32h 20mUnited Airlines

Deal found 8/14

$355

Fri 8/291:15 pmONT - MTJ

1 stop6h 07mUnited Airlines

Deal found 8/15

$368

Sun 12/216:46 amONT - MTJ

2 stops30h 04mAmerican Airlines

Deal found 8/14

$394

Fri 12/196:39 pmONT - MTJ

2 stops17h 02mUnited Airlines

Deal found 8/14

$455

Fly from

Fly to

Route

Depart

Return

Price

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Sat 9/13

5:10 am-12:47 pm

1 stop6h 37m

Montrose County

Sat 9/20

3:24 pm-8:43 pm

1 stop6h 19m

$319

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Mon 9/1

5:10 am-12:47 pm

1 stop6h 37m

Montrose County

Fri 9/5

1:43 pm-5:29 pm

1 stop4h 46m

$341

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Tue 10/14

1:15 pm-8:19 pm

1 stop6h 04m

Montrose County

Sat 10/18

3:25 pm-8:24 pm

1 stop5h 59m

$359

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Fri 8/29

1:15 pm-8:22 pm

1 stop6h 07m

Montrose County

Sat 9/20

3:24 pm-8:43 pm

1 stop6h 19m

$400

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Sun 10/5

5:05 am-12:46 pm

1 stop6h 41m

Montrose County

Sat 10/11

3:25 pm-8:24 pm

1 stop5h 59m

$407

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Fri 11/7

5:05 am-12:29 pm

1 stop6h 24m

Montrose County

Tue 11/11

7:15 am-5:34 pm

2 stops11h 19m

$548

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Fri 9/26

5:05 am-12:46 pm

1 stop6h 41m

Montrose County

Mon 9/29

7:30 am-12:51 pm

1 stop6h 21m

$552

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Wed 10/1

5:05 am-12:46 pm

1 stop6h 41m

$221

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Wed 12/17

6:41 pm-3:18 pm

1 stop19h 37m

$248

OntarioMontrose

ONT - MTJ

ONTMTJ

Ontario

Tue 12/16

1:34 pm-8:10 pm

1 stop5h 36m

$259

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/15

Showing 1-10 of 17 results

Best time to book a flight from Ontario to Montrose

Have a flexible travel schedule? Discover the best time to fly to Montrose 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 Montrose

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

Currently, October is the cheapest month in which you can book a flight from Ontario to Montrose (average of $371). Flying from Ontario to Montrose in March is currently the most expensive (average of $539). 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 Montrose

Read through reviews of airlines operating flights from Ontario to Montrose, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Dozens of flights and I've never seen a row's beverages forgotten. I even went back and asked the attendant to check on them and nothing. I really hope it didn't have something to do with the Black mother with her kid in the row. Otherwise it was a typical Southwest flight, rapid boarding, tolerable leg room.

Southwest

8.0

Very good

4,246 reviews

Southwest

8.0

Very good

4,246 reviews

Reviews

1 / 20

8.0

Excellent

Walter,Aug 2025

OAK - SAN

Related info for your journey

What is the cheapest airline to fly from Ontario to Montrose round-trip?
Flying on Southwest is currently your cheapest option to Montrose, with prices starting at $366.
Can I find deals for flights from Ontario to Montrose that include hotel bookings?
Yes. In addition to deals on Ontario to Montrose flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Ontario to Montrose?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Montrose.
Can I find deals for business class flights from Ontario to Montrose?
Yes. Cheapflights offers flight deals from Ontario to Montrose 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 Montrose?
Currently, October is the cheapest month in which you can book a flight from Ontario to Montrose (average of $371). Flying from Ontario to Montrose in March is currently the most expensive (average of $539). 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

Browse thousands of different options on Cheapflights for your next trip

Top airline flying from Ontario to Montrose

Airline	Cheapest	Average	Flexibility	On-time
Southwest	Cheapest$366	Average$426	FlexibilityNo cancel fee	On-time63%

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$221+ Cheap flights from Ontario to Montrose (ONT - MTJ)

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 10/1. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Ontario to Montrose with Cheapflights

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Cheap flight deals from Ontario to Montrose

Round-trip from

One-way from

Popular in

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Find flight deals from Ontario to Montrose

Cheapest flights from Ontario to MontroseExplore the most affordable flight options available from Ontario to Montrose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Explore the most affordable flight options available from Ontario to Montrose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Ontario to Montrose that are best for you.

Best time to book a flight from Ontario to Montrose

Have a flexible travel schedule? Discover the best time to fly to Montrose from Ontario with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Ontario to Montrose

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

Reviews of airlines servicing Montrose

Read through reviews of airlines operating flights from Ontario to Montrose, such as Southwest. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

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

What is the cheapest airline to fly from Ontario to Montrose round-trip?

Can I find deals for flights from Ontario to Montrose that include hotel bookings?

How can I find direct flights from Ontario to Montrose?

Can I find deals for business class flights from Ontario to Montrose?

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Ontario to Montrose

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Top airline flying from Ontario to Montrose

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Cheapest flights from Ontario to Montrose
Explore the most affordable flight options available from Ontario to Montrose. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 16, 2025.