Portland to Idaho Falls Flights on Allegiant from $56*
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Flights from Portland to Idaho Falls
*Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply.
Deals from Portland to Idaho Falls
From | To | Fare Type | Dates | Price |
|---|---|---|---|---|
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: December 12 2025 | From $56 Seen: 7 hrs ago |
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: December 15 2025 | From $60 Seen: 7 hrs ago |
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: December 26 2025 | From $73 Seen: 1 day ago |
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: January 2 2026 | From $110 Seen: 2 hrs ago |
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: January 5 2026 | From $130 Seen: 10 hrs ago |
| Portland (PDX) | Idaho Falls (IDA) | One-way / Economy | Departing: January 3 2026 | From $130 Seen: 9 hrs ago |
*Fares displayed have been collected within the last 48hrs and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply.
Flight Details
Departing From:
Portland International Airport (PDX)
Arriving To:
Idaho Falls Regional Airport (IDA)
Average Flight Time:
01 hour 31 minutes
Travel Tips
Bundles are packages of popular services with an added discount.
Select a bundle to:
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Streamline the booking experience
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Save time
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Save money!
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Click here for more information.
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Benefits include free checked bag, carry on, etc. Click here to learn more.
Lock in the lowest price by adding your checked and carryon bags when you book your flight.
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By charging for carry-ons, we ensure there is space for everyone who needs it.
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This leads to speedier boarding. Click here to see your bag options.
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About Idaho Falls
Idaho Falls Regional Airport is located two miles northwest of the central business district of Idaho Falls, ID. Explore and get to know Idaho Falls by booking a car along with your flight. Allegiant offers exclusive discounts with Alamo, Enterprise, and National when you rent a car with your flight to Idaho Falls.
Frequently Asked Questions
Yes, Allegiant provides in-flight service on every flight. For more details on the variety of snacks and drinks available on board flights for purchase, check out our In Flight Refreshments & Services page.
Yes, all Allegiant Air flights from Portland to Idaho Falls are nonstop.
The day with the lowest fare can differ week to week. To find out what upcoming days have the lowest price to from fly Portland to Idaho Falls, please check out our flight search tool, which makes finding our lowest fare a breeze.
You can make changes to your reservation from Portland to Idaho Falls a breeze by clicking Manage Trips on our homepage. Fees and fare difference may apply.
Click Flight Status on our homepage to view the status of your upcoming flight from Portland to Idaho Falls.
Yes you can book a rental car. Yes, rental car facilities are available in Idaho Falls. Allegiant offers exclusive discounts with Alamo, Enterprise and National when you book a car together with your flight from Portland to Idaho Falls. Allegiant’s travel bundle makes flying a breeze.
