Compare fares, departure times, stops and baggage details for this route, then open the full search when you are ready to check current availability and complete booking.
ONTDENFri, 30 Oct
Fare checked before payment All fees shown upfront Transparent cancellation policy 24×7 booking support
Lowest fareUS$257American Airlines
Fastest2h 13mgate to gate
Options found21flights on this route
Find your flightONT → DEN
Available Flights & Fares
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Airfare Highlights
From flights departing on Fri, 30 Oct 2026.
Lowest fare$257American Airlines06:15
Earliest departure$258United Airlines05:00
Shortest duration$258United Airlines13:32
Night
00:00-05:59
$258United Airlines at 05:00Morning
06:00-11:59
$257American Airlines at 06:15Afternoon
12:00-17:59
$257American Airlines at 16:29Evening
18:00-23:59
No optionOpen full search for more
Departure & Arrival Airport Details
Ontario (ONT)
Ontario International
United States
GMT -8
Latitude: 34.055999755859375
Longitude: -117.60099792480469
Denver (DEN)
Denver International
United States
GMT -7
Latitude: 39.861698150635
Longitude: -104.672996521
Distance: Ontario (ONT), United States to Denver (DEN), United States - 1,315.73 km
Flights shown for 30 Oct 2026. View all flights opens the complete search result.
Fares and hotel rates usually run higher around these dates. Booking earlier or moving your trip by a day or two often costs less.
Busiest periods: Summer travel (15 Jun – 31 Aug), Holiday season (18 Dec – 02 Jan).
12OctColumbus DayMondayPeak
12OctColumbus DayMondayPeak
12OctIndigenous Peoples' DayMondayPeak
11NovVeterans DayWednesdayPeak
26NovThanksgiving DayThursdayPeak
25DecChristmas DayFridayPeak
Fixed-date national holidays. Festivals that follow the lunar calendar shift each year and are not listed here, so check the exact date for your travel year.
Compare your journey
How to travel Ontario to Denver
Ways to make this trip that you can book on FlyX, compared by price and journey time.
OptionFromJourney timeAvailabilityAction
Non-stop flight Fastest₹24,9072h 13m2 flights
Connecting flight₹24,791Longer, includes a stop19 options
Air distance is about 1,316 km. 4 airlines operate this route.
Road distance and coach duration are approximate estimates from the air distance, not a timetable.
Airlines flying from Ontario to Denver
Compare fares, stops, baggage and refundability across the airlines flying this route.
UN
United Airlines Flights
from $25810 flights
Fares from
$258
Non-stop
2 in these results
Departures
10 in the list above
AM
American Airlines Flights
from $2576 flights
Fares from
$257
Non-stop
None in these results
Departures
6 in the list above
AL
Alaska Airlines Flights
from $3133 flights
Fares from
$313
Non-stop
None in these results
Departures
3 in the list above
Route Overview & Flight Facts
Fastest flight duration
2h 13m · United Airlines
First departure of the day
05:00 · United Airlines
Last departure of the day
16:29 · American Airlines
Flight options found
21
Direct / non-stop options
2
Airport codes
Ontario–ONT, Denver–DEN
Fares and timings are indicative. The exact price is confirmed with the airline when you search.
Flight Schedule, Timings & Airfare Insights
Daily Flight Schedule & Travel Duration
The search for Fri, 30 Oct found 21 flight options, 2 of them non-stop. The first flight leaves around 05:00 and the last around 16:29. The fastest flight takes about 2h 13m.
Morning vs Evening Departure Fares
Lowest fare by departure window: Morning from $257, Afternoon from $257, Night from $258. These observations do not predict the cheapest departure window on other dates.
Cheapest Airfare & Best Time to Book
Search your travel dates to compare current fares. Prices change with airline seat availability.
One-Way vs Round-Trip Fare Comparison
Compare the complete cost and conditions of both options for your dates. A round-trip can have different fare and change rules from two one-way tickets. One booking may contain multiple airline PNRs; confirm baggage transfer and connection protection for separate tickets.
Online Web Check-In & Boarding Pass
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How to Book Cheap Flights on FlyX
1
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2
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3
Open the fare choices
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4
Review the final price
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5
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Why Book Your Flight with FlyX?
Compare the available Ontario to Denver options by total price, stops, baggage and fare conditions. Search your dates for current availability, then review traveller details and the final price before paying.
Payment confirmation and ticket issuance are separate steps. If your booking is awaiting a PNR or ticket, follow its status and contact FlyX support when you need help. Your issued ticket contains the airline reference and itinerary. Change and cancellation charges depend on the purchased fare and any separately disclosed service fee.
Fare checked before paymentCoupon eligibility checkedBooking status trackingBooking support
Exclusive Flight Offers & Promo Coupons
Coupon code
Offer
Max saving
FLYX20
Up to 20% Off on Flights
₹1,500
Check coupon eligibility and the final discount on the review page before you pay. View full terms.
Frequently Asked Questions
Is it worth booking Ontario to Denver flights in advance?
There is no guaranteed cheapest booking window. Compare your planned dates early, check nearby dates and consider baggage, connection time and change conditions as well as price. On the Ontario to Denver dates shown on this page, the lowest fare is on a Friday at $257. This can change from week to week.
How far is Ontario from Denver by air?
The direct air distance between Ontario (ONT) and Denver (DEN) is about 1,316 km. Actual flight time varies with the routing the airline files and with winds on the day.
Are there non-stop flights from ONT to DEN?
Yes. 2 non-stop flights are listed on this page for Ontario to Denver. Use the Stops filter to see only those.
Which airlines fly Ontario to Denver?
United Airlines, American Airlines and Alaska Airlines are listed on this route for the dates shown here. Fares, baggage allowance and refund rules differ by airline and by fare type, so compare the fare conditions and not only the headline price.
How long is the flight from Ontario to Denver?
The quickest non-stop Ontario to Denver flight on this page takes about 2h 13m. Non-stop flights here take between 2h 13m and 2h 17m. Journeys with a stop take longer, since the total includes the layover.
What is the cheapest Ontario to Denver flight fare?
The lowest Ontario to Denver fare on this page is $257. Fares on the same dates run up to $813, depending on airline, timing and fare type. Airline prices change often, so search your dates for the current fare.
What time do Ontario to Denver flights depart?
On the dates shown here, the first departure is around 05:00 and the last around 16:29, local time at Ontario. Use the departure-time filter on the results above to narrow to a morning, afternoon or evening slot.
Why does the price change after clicking Book Now?
Airline seat inventory and fares change continuously. Selecting Book Now runs a live fare verification with the airline so the price you approve is the price you pay. If it has moved, you see the new figure before any payment.
Before you book this route
Check the airport codes ONT–DEN, local departure and arrival dates, and every connecting airport. Connections can have different document and baggage requirements from your final destination.
Where these fares come from
The fares, durations, stops and baggage shown here come from real airline search results for this route. They are examples for the dates on this page, not a full timetable and not a locked price. Run a search to see what is available for your own dates.
Fares shown are for departures on .
Check official travel requirements
Confirm passport, visa and transit rules for your nationality and full itinerary with the relevant government and operating airline. IATA travel-document information explains why requirements vary.
Planning more than the flight? Our United States guide covers the visa process for Indian passport holders, best time to go, how long to plan for, and which places are worth the days you have. Long-haul city breaks and national parks.
The ONT to DEN cards above show selected flight options. Airline prices and seat availability can move quickly, so the final fare is rechecked in the booking flow.
Approx route distance: 1,315.73 km.
Before you book
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Check fare choices
Continue to Booking opens the verified fare choices, including baggage and refundability, before review.
Lowest Ontario to Denver airfare, in 30 days and in 90 days
Cheapest Fare
Fare
Date
Airline
Departure
Lowest Airfare
$257
30/10/2026
American Airlines
06:15
Cheapest Airfare Within 30 Days
$252
07/11/2026
American Airlines
06:15
Cheapest Airfare Within 90 Days
$244
06/01/2027
American Airlines
06:15
Book Ontario to Denver Flight Tickets on FlyX
FlyX lists each Ontario to Denver flight in these results with its fare, departure time, stops, layover airport and baggage, so you can compare air tickets side by side. To find a cheap ticket, sort by price and check what baggage the fare includes. The fare is checked with the airline again before you pay.
Ontario to Denver Flight Distance, Duration and Time
The aerial distance between Ontario and Denver is about 1,316 KM. In these results, journey times range from 2h 13m to 7h 42m. Flights with a layover take longer because the total includes the connection time.
Ontario to Denver Flight Schedule and Timing
The search for these dates returned 21 flight options, 2 of them non-stop. The first departure from Ontario is at 05:00 and the last is at 16:29. Flights leave from Ontario International and land at Denver International.
Flight Route Details & Analysis
Flight Details
Information
Route
Ontario to Denver
Aerial Distance
1,316 KM
Flight Duration
2h 13m - 7h 42m
Airport Codes
Ontario - ONT, Denver - DEN
Total Flights Available
21 flights2 direct19 with layovers
First Flight Departure
Departs at 05:00
Last Flight Departure
Departs at 16:29
Early Morning Flights (12 AM - 8 AM)
6 flights1 direct5 with layovers
Morning Flights (8 AM - 12 PM)
4 flights0 direct4 with layovers
Afternoon Flights (12 PM - 4 PM)
6 flights1 direct5 with layovers
Evening Flights (4 PM - 8 PM)
5 flights0 direct5 with layovers
Night Flights (8 PM - 12 AM)
No flights in this time slot
Airport Information & Terminals
ONT: Ontario airport. Ontario airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
DEN: Denver airport. Denver airport transfer should be matched to the exact hotel, suburb or meeting area. Rail can work well for light luggage, but late arrivals, winter weather and family baggage often make a direct cab or booked transfer easier.
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Ontario to Denver
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Ontario International
