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 | |
|---|---|---|---|---|---|
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Apr 25, 2026 | From $99 Seen: 59 minutes ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Apr 28, 2026 | From $99 Seen: 59 minutes ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: Apr 20, 2026 | From $109 Seen: 59 minutes ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: May 16, 2026 | From $139 Seen: 59 minutes ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: May 18, 2026 | From $139 Seen: 12 hours ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: May 5, 2026 | From $149 Seen: 59 minutes ago | |
| Seattle (SEA) | Idaho Falls (IDA) | One-way | Saver | Depart: May 8, 2026 | From $149 Seen: 59 minutes ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: Oct 29, 2026 | From $179 Seen: 10 hours ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: Oct 28, 2026 | From $179 Seen: 10 hours ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: May 16, 2026 | From $192 Seen: 58 minutes ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: May 13, 2026 | From $192 Seen: 58 minutes ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: Apr 20, 2026 | From $194 Seen: 17 hours ago | |
| Portland (PDX) | Idaho Falls (IDA) | One-way | Saver | Depart: Jun 10, 2026 | From $219 Seen: 13 hours ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: May 18, 2026 | From $222 Seen: 58 minutes ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: May 20, 2026 | From $262 Seen: 58 minutes ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: May 28, 2026 | From $262 Seen: 58 minutes ago | |
| Boise (BOI) | Idaho Falls (IDA) | One-way | Saver | Depart: Jun 2, 2026 | From $262 Seen: 58 minutes 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)