Book Cheap Flights from Idaho Falls with Alaska Airlines
Find round-trip flight deals from Idaho Falls.*
Idaho Falls (IDA)to
Seattle (SEA)*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.
One-way flight deals from Idaho Falls.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Idaho Falls (IDA) | Seattle (SEA) | One-way | Saver | Depart: Sep 17, 2025 | From $109 Seen: 2 hours ago | |
| Idaho Falls (IDA) | Seattle (SEA) | One-way | Saver | Depart: Sep 26, 2025 | From $129 Seen: 14 hours ago | |
| Idaho Falls (IDA) | Seattle (SEA) | One-way | Saver | Depart: May 30, 2026 | From $139 Seen: 16 hours ago |
*Displayed prices have been available within the past 24 hours and may not be available at the time of booking. Fares listed may be Saver fares, which is our most restrictive fare option and subject to additional restrictions. For roundtrip journeys, the price displayed—available within the past 24 hours—is the aggregate of the lowest available fare each way. Additional baggage charges and fees for optional products and services may apply. Other terms and conditions may apply.