$90+ Cheap flights from Idaho Falls to Ontario (IDA - 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 5/15. Fares are subject to change and may not be available on all flights or dates of travel.
IDA — ONT
May 17 — May 241
Round-trip
1 adult, Economy
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Find cheap flights from Idaho Falls to Ontario 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
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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 Idaho Falls to Ontario
Cheapest
Best
Last-minute
One-way
Cheapest flights from Idaho Falls to OntarioExplore the most affordable flight options available from Idaho Falls to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2026.
Explore the most affordable flight options available from Idaho Falls to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 17, 2026.
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Mon 5/1110:21 pm
IDA
- ONT
1 stop18h 23m
Multiple Airlines
Mon 5/188:44 am
ONT
- IDA
1 stop5h 43m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$192
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:21 pm
IDA
- ONT
1 stop18h 23m
Multiple Airlines
Mon 5/118:44 am
ONT
- IDA
1 stop5h 43m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$206
This Alaska Airlines deal was found by Cheapflights users on 4/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/64:06 pm
IDA
- ONT
1 stop7h 26m
Alaska Airlines
Wed 5/207:00 am
ONT
- IDA
1 stop5h 17m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/16. 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.
Thu 5/76:54 pm
IDA
- ONT
1 stop5h 40m
Delta
Wed 5/134:57 pm
ONT
- IDA
1 stop4h 45m
Delta
Deal found 4/16![Delta logo]()
$355
This Delta deal was found by Cheapflights users on 4/17. 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.
Wed 6/36:54 pm
IDA
- ONT
1 stop5h 40m
Delta
Mon 6/86:00 am
ONT
- IDA
1 stop3h 43m
Delta
Deal found 4/17![Delta logo]()
$361
This Delta deal was found by Cheapflights users on 4/15. 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 12/216:45 pm
IDA
- ONT
1 stop6h 03m
Delta
Mon 12/285:05 pm
ONT
- IDA
1 stop4h 14m
Delta
Deal found 4/15![Delta logo]()
$381
Best flights from Idaho Falls to OntarioDiscover carefully curated flight deals from Idaho Falls to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2026.
Discover carefully curated flight deals from Idaho Falls to Ontario that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 17, 2026.
This Alaska Airlines deal was found by Cheapflights users on 4/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/64:06 pm
IDA
- ONT
1 stop7h 26m
Alaska Airlines
Wed 5/206:00 am
ONT
- IDA
1 stop8h 26m
Alaska Airlines
Deal found 4/12![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/15. 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.
Wed 6/36:54 pm
IDA
- ONT
1 stop5h 40m
Delta
Mon 6/86:00 am
ONT
- IDA
1 stop3h 43m
Delta
Deal found 4/15![Delta logo]()
$361
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/66:00 am
IDA
- ONT
1 stop6h 10m
Alaska Airlines
Tue 6/94:03 pm
ONT
- IDA
1 stop5h 50m
Alaska Airlines
Deal found 4/15![Alaska Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 4/16. 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.
Sat 5/26:58 pm
IDA
- ONT
1 stop4h 45m
Delta
Wed 5/65:05 pm
ONT
- IDA
1 stop4h 35m
Delta
Deal found 4/16![Delta logo]()
$470
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:03 pm
IDA
- ONT
2 stops20h 07m
Alaska Airlines
Mon 6/812:04 pm
ONT
- IDA
1 stop9h 49m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$459
This Delta deal was found by Cheapflights users on 4/13. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
IDA
- ONT
1 stop5h 46m
Delta
Sat 5/25:59 pm
ONT
- IDA
1 stop3h 41m
Delta
Deal found 4/13![Delta logo]()
$470
Last-minute flights from Idaho Falls to OntarioDiscover last-minute flight deals from Idaho Falls to Ontario. Data last updated April 17, 2026 and is based on user searches.
Discover last-minute flight deals from Idaho Falls to Ontario. Data last updated April 17, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 4/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/410:21 pm
IDA
- ONT
1 stop18h 23m
Multiple Airlines
Mon 5/118:44 am
ONT
- IDA
1 stop5h 43m
Multiple Airlines
Deal found 4/12![Multiple Airlines logo]()
$206
This Delta deal was found by Cheapflights users on 4/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/46:58 pm
IDA
- ONT
1 stop5h 46m
Delta
Mon 5/116:00 am
ONT
- IDA
1 stop3h 47m
Delta
Deal found 4/12![Delta logo]()
$381
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/54:06 pm
IDA
- ONT
1 stop7h 26m
Alaska Airlines
Mon 5/113:26 pm
ONT
- IDA
1 stop6h 14m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$409
This Alaska Airlines deal was found by Cheapflights users on 4/14. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/64:06 pm
IDA
- ONT
1 stop7h 26m
Alaska Airlines
Wed 5/207:00 am
ONT
- IDA
1 stop5h 17m
Alaska Airlines
Deal found 4/14![Alaska Airlines logo]()
$329
This Delta deal was found by Cheapflights users on 4/16. 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.
Thu 5/76:54 pm
IDA
- ONT
1 stop5h 40m
Delta
Wed 5/134:57 pm
ONT
- IDA
1 stop4h 45m
Delta
Deal found 4/16![Delta logo]()
$355
This Kiwi.com deal was found by Cheapflights users on 4/13. 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.
Mon 5/1110:21 pm
IDA
- ONT
1 stop18h 23m
Multiple Airlines
Mon 5/188:44 am
ONT
- IDA
1 stop5h 43m
Multiple Airlines
Deal found 4/13![Multiple Airlines logo]()
$192
One-way flights from Idaho Falls to OntarioSearch for one-way flight options from Idaho Falls to Ontario. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
Search for one-way flight options from Idaho Falls to Ontario. Find affordable one-way fares based on user searches. Data last updated April 17, 2026.
This Trip.com deal was found by Cheapflights users on 4/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/1510:21 pm
IDA
- ONT
1 stop22h 11m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$90
This Trip.com deal was found by Cheapflights users on 4/15. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/810:21 pm
IDA
- ONT
1 stop17h 48m
Multiple Airlines
Deal found 4/15![Multiple Airlines logo]()
$104
This Delta deal was found by Cheapflights users on 4/12. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/306:54 pm
IDA
- ONT
1 stop4h 51m
Delta
Deal found 4/12![Delta logo]()
$165
This Alaska Airlines deal was found by Cheapflights users on 4/16. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/246:00 am
IDA
- ONT
1 stop6h 10m
Alaska Airlines
Deal found 4/16![Alaska Airlines logo]()
$190
This Alaska Airlines deal was found by Cheapflights users on 4/15. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/161:54 pm
IDA
- ONT
1 stop6h 08m
Alaska Airlines
Deal found 4/15![Alaska Airlines logo]()
$205
This Alaska Airlines deal was found by Cheapflights users on 4/13. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/264:03 pm
IDA
- ONT
2 stops8h 55m
Alaska Airlines
Deal found 4/13![Alaska Airlines logo]()
$207
This Expedia deal was found by Cheapflights users on 4/12. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/221:43 pm
IDA
- ONT
1 stop10h 28m
Alaska Airlines
Deal found 4/12![Alaska Airlines logo]()
$210
This Alaska Airlines deal was found by Cheapflights users on 4/12. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:03 pm
IDA
- ONT
2 stops20h 07m
Alaska Airlines
Deal found 4/12![Alaska Airlines logo]()
$213
This Delta deal was found by Cheapflights users on 4/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/286:58 pm
IDA
- ONT
1 stop5h 46m
Delta
Deal found 4/14![Delta logo]()
$221
Find flight deals from Idaho Falls to Ontario
Discover tips and strategies to find the most affordable flight options for your journey from Idaho Falls (IDA) 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 April 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $192 (Kiwi.com) |
One-way from | $90 (Trip.com) |
Popular in | November |
Cheapest in | April |
Average price | $161 |
Cheapflights Fare Finder
Customize your flight search to find flights from Idaho Falls 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 April 17, 2026.
Use the filters below to find and compare flights from Idaho Falls to Ontario that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Wed 5/6
4:06 pm-10:32 pm
1 stop7h 26m
Ontario
Wed 5/20
6:00 am-3:26 pm
1 stop8h 26m
$329
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Wed 6/3
6:54 pm-11:34 pm
1 stop5h 40m
Ontario
Mon 6/8
6:00 am-10:43 am
1 stop3h 43m
$361
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Sat 6/6
6:00 am-11:10 am
1 stop6h 10m
Ontario
Tue 6/9
4:03 pm-10:53 pm
1 stop5h 50m
$369
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Wed 6/3
4:03 pm-11:10 am
2 stops20h 07m
Ontario
Mon 6/8
12:04 pm-10:53 pm
1 stop9h 49m
$459
Quickest round-trip
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Sat 5/2
6:58 pm-10:43 pm
1 stop4h 45m
Ontario
Wed 5/6
5:05 pm-10:40 pm
1 stop4h 35m
$470
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Tue 4/28
6:58 pm-11:44 pm
1 stop5h 46m
Ontario
Sat 5/2
5:59 pm-10:40 pm
1 stop3h 41m
$470
Cheapest one-way
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Sat 5/30
6:54 pm-10:45 pm
1 stop4h 51m
$165
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Sun 5/24
6:00 am-11:10 am
1 stop6h 10m
$190
Quickest one-way
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Mon 5/25
6:00 am-8:53 am
1 stop3h 53m
$190
Idaho FallsOntario
IDA - ONT
IDAONT
Idaho Falls Fanning Field
Tue 5/26
1:54 pm-6:47 pm
1 stop5h 53m
$205
Showing 1-10 of 14 resultsSorted by cheapest first
Compare providers for flights from Idaho Falls to Ontario
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 Idaho Falls to Ontario in April.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Idaho Falls-Ontario flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Idaho Falls-Ontario flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Idaho Falls-Ontario flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Idaho Falls-Ontario 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 Idaho Falls-Ontario 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 Idaho Falls to Ontario
Have a flexible travel schedule? Discover the best time to fly to Ontario from Idaho Falls with our price prediction graph.
IDA-ONT
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 Idaho Falls to Ontario
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 April 17, 2026.
Peruse reviews from past customers who have flown with Delta and United Airlines from Idaho Falls to Ontario to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Food
7.2
Crew
8.5
Boarding
8.1
Entertainment
7.8
Overall
7.9
Comfort
7.9
Reviews
1 / 20
10.0
ExcellentAaron,Oct 2024
TUS - LAX
Related info for your journey
Find useful and relevant information for your journey from Idaho Falls to Ontario. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Idaho Falls to Ontario
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Complete your trip
Complete your trip to Ontario by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Idaho Falls to Ontario by cabin class
Find flights from Idaho Falls to Ontario, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Other flights to Ontario
Explore flights to Ontario departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
Idaho Falls and Ontario flights
Browse other Idaho Falls and Ontario flight options. Last updated on April 17, 2026.
Other flights from Idaho Falls
Browse through other flights departing from Idaho Falls. Flights are based on user searches made on Cheapflights and were last updated on April 17, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 2 airlines flying from Idaho Falls to Ontario
Discover the top 2 airlines that operate flights from Idaho Falls 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 April 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$143 | Average$565 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$155 | Average$398 | FlexibilityNo cancel fee | On-timeN/A |