Lowest Priced Flights to Idaho Falls on Alaska Airlines starting at $99*
Most popular flights to Idaho Falls on Alaska Airlines.*
Seattle (SEA)to
Idaho Falls (IDA)Seattle (SEA)to
Idaho Falls (IDA)Seattle (SEA)to
Idaho Falls (IDA)Seattle (SEA)to
Idaho Falls (IDA)Seattle (SEA)to
Idaho Falls (IDA)Portland (PDX)to
Idaho Falls (IDA)*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.
Top offers for Idaho Falls one-way flights.*
From | To | Fare Type | Dates | Price | |
|---|---|---|---|---|---|
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: May 20, 2026 | From $99 Seen: 11 hours ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: May 26, 2026 | From $129 Seen: 2 hours ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Aug 24, 2026 | From $179 Seen: 14 hours ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Jun 12, 2026 | From $179 Seen: 3 hours ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: May 22, 2026 | From $189 Seen: 6 hours ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Jul 19, 2026 | From $244 Seen: 6 hours ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: Jun 18, 2026 | From $487 Seen: 13 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.
Plan a trip to Idaho Falls
Set on the Snake River that runs from Wyoming to Eastern Washington, Idaho Falls was first developed when an industrious settler began running a ferry to shuttle travelers from one side of the river to the other in 1864. Not long after, a bridge was built downstream and the small outpost (originally called Taylor’s Crossing) grew as a key junction to the West. The city is now named after the picturesque waterfalls that also generate hydroelectric power. Take in the views from the ​​Idaho Falls River Walk, a five-mile trail along the scenic riverbanks. Immerse yourself in nature even further with a two-hour drive to see either the majestic mountains of Grand Teton National Park or Yellowstone National Park’s famous landmarks.
View airport information for Idaho Falls (IDA)