Cheap Flights from Boise to Seattle
Browse current best options from Boise. Become a member to unlock all deals and get alerts when new deals appear.
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Prices updated 24 days ago
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171 airlines compared
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Fares are subject to change and may not be available for all dates. (Data last updated May 29, 2026.)
Today’s best flight deals from Boise to Seattle
Explore current cheapest deals departing from Boise to Seattle
Round trip
Sort by: Cheapest
October 20 - October 27
BOI - Seattle
$152
$178
Round trip
October 20 - October 24
BOI - Seattle
$157
$178
Round trip
September 8 - September 19
BOI - Seattle
$118
$179
Round trip
August 19 - August 23
BOI - Seattle
$134
$188
Round trip
October 10 - October 11
BOI - Seattle
$155
$188
Round trip
September 10 - September 12
BOI - Seattle
$135
$190
Round trip
August 21 - August 24
BOI - Seattle
$134
$196
Round trip
August 19 - August 29
BOI - Seattle
$119
$197
Round trip
September 8 - September 15
BOI - Seattle
$130
$197
Round trip
September 22 - September 23
BOI - Seattle
$258
$197
Round trip
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Route Intelligence — 486,190 Searches this Week
Insights for flights from Boise to Seattle
How much is a round trip from Boise to Seattle
Regular price: $118 - $259
Prices for flights from Boise to Seattle are currently within the regular range.
The regular price range for flights from Boise to Seattle is between $118 and $259. The current lowest deal is $178 with Alaska Airlines, Inc. for travel from Oct 20-Oct 27.
now $178
Low $118
High $259
The cheapest time to fly from Boise to Seattle
The cheapest month to fly from Boise to Seattle is April, with a median price of $157. The most expensive month is March, with a median price of $1434. Prices are generally lower from January to December.
April
Flights from $157
March
Flights from $1,434
Direct flights from Boise to Seattle
Alaska Airlines, Inc.
Last-minute flights going from Boise to Seattle
Tue, Jun 16
BOI - Seattle
Boise (BOI) - Seattle (SEA)
Frontier Airlines
$433
$411
One-way
Sun, Jun 21
BOI - Seattle
Boise (BOI) - Seattle (SEA)
Alaska Airlines, Inc.
$237
$238
One-way
Mon, Jun 22
BOI - Seattle
Boise (BOI) - Seattle (SEA)
$396
$383
One-way
Tue, Jul 7
BOI - Seattle
Boise (BOI) - Seattle (SEA)
Frontier Airlines
$273
$239
One-way
Thu, Jul 9
BOI - Seattle
Boise (BOI) - Seattle (SEA)
Frontier Airlines
$282
$264
One-way
Thu, Jul 9
BOI - Seattle
Boise (BOI) - Seattle (SEA)
Alaska Airlines, Inc.
$162
$278
One-way
Biggest price drops on these dates for flights from Boise to Seattle
Sep 22 - Sep 23
$258 → $197
24%
Oct 14 - Oct 15
$268 → $216
19%
Oct 9 - Oct 12
$268 → $217
19%
Oct 18 - Oct 22
$269 → $219
19%
Popular Airports to fly from Boise to Seattle
Boise - Seattle route insights
💸 Price insights
Recent fares near the typical level
Recent roundtrip fares from Boise to Seattle are near the typical level at $178.
📅 Best time to fly
April is historically cheapest at $157
Historically, April is the cheapest month to fly from Boise to Seattle, with a median price of $157.
⏱️ Flight duration
Direct flights take 3h 1m
Direct flights from Boise to Seattle typically take 3 hours and 1 minute.
✈️ Airlines & availability
Frequent deals on direct flights
This route frequently has deals, with 85.2% of recent fares being direct flights.
🏆 Airline highlight
Alaska Airlines, Inc. offers direct flights
Alaska Airlines, Inc. is one airline offering direct flights from Boise to Seattle.
🎯 Booking tip
Compare deals across multiple providers
Comparing deals from various providers can help you find the best prices for your trip.
Boise main airports to depart from
Boise (BOI)
Boise Airport (BOI) is a convenient option for flights from Boise to Seattle.
📍 ~6 km from city center (reachable by car)
💸 Flights from ~$178
Seattle main airports to arrive at
Seattle–Tacoma International (SEA)
Seattle–Tacoma International Airport is a primary arrival choice for flights from Boise to Seattle.
📍 ~20 km from Seattle city center (reachable by car, public transit).
💸 Flights from ~$178
Boeing Field (BFI)
Boeing Field offers an alternative arrival option for flights from Boise to Seattle.
📍 ~10 km from Seattle city center (reachable by car, public transit).
💸 Flights from ~$746
Kenmore Air Harbor Seaplane Base (LKE)
Kenmore Air Harbor Seaplane Base provides a unique arrival point for flights from Boise to Seattle.
📍 ~5 km from Seattle city center (reachable by car, public transit).
💸 Flights from ~$1447
Airports nearby Seattle used as alternative
Paine Field Everett (PAE)
Paine Field Everett (PAE) offers a convenient alternative for North Seattle residents with shorter security wait times.
📍 ~29 km from Seattle (reachable by car)
💸 Flights from ~$330
Portland International (PDX)
Portland International (PDX) is a major international hub that often competes on price for long-haul flights.
📍 ~230 km from Seattle (reachable by car or train)
💸 Flights from ~$178
Vancouver International (YVR)
Vancouver International (YVR) is a major international gateway with extensive transpacific and European flight options.
📍 ~200 km from Seattle (reachable by car, requires international border crossing)
💸 Flights from ~$376
Bellingham International (BLI)
Bellingham International (BLI) is a primary low-cost carrier airport, often featuring budget-friendly fares.
📍 ~145 km from Seattle (reachable by car)
💸 Flights from ~$361
Abbotsford International (YXX)
Abbotsford International (YXX) is an alternative low-cost gateway for Canadian domestic connections.
📍 ~115 km from Seattle (reachable by car, requires international border crossing)
💸 Flights from ~$474
Business & First Class Flight Deals to Seattle
Discover luxury on the budget with premium cabin class on flights from Boise to Seattle.
Elite
Best Elite deals to Seattle
Exclusive daily First Class, Business Class, and Premium Economy flight deals, refreshed every 24 hours.
From BOI
Elite
Oct 28
Seattle, United States
85% AI deal score
$1,310
$306
Save $1,004
From BOI
Elite
Oct 28
Seattle, United States
82% AI deal score
$749
$342
Save $407
From BOI
Elite
Aug 28
Seattle, United States
76% AI deal score
$1,337
$457
Save $880
From BOI
Elite
Oct 08
Seattle, United States
75% AI deal score
$1,352
$457
Save $895
From BOI
Elite
Jun 30
Seattle, United States
72% AI deal score
$1,254
$762
Save $492
From BOI
Elite
Aug 28
Seattle, United States
72% AI deal score
$1,542
$913
Save $629
From BOI
Elite
Sep 09
Seattle, United States
67% AI deal score
$466
$357
Save $109
From BOI
Elite
Oct 30
Seattle, United States
67% AI deal score
$479
$367
Save $112
From BOI
Elite
Aug 22
Seattle, United States
66% AI deal score
$432
$356
Save $76
From BOI
Elite
Sep 15
Seattle, United States
66% AI deal score
$440
$367
Save $73
From BOI
Elite
Nov 01
Seattle, United States
66% AI deal score
$459
$367
Save $92
From BOI
Elite
Oct 20
Seattle, United States
48% AI deal score
$451
$417
Save $34
From BOI
Elite
Oct 27
Seattle, United States
46% AI deal score
$421
$417
Save $4
From BOI
Elite
Oct 31
Seattle, United States
46% AI deal score
$423
$417
Save $6
From BOI
Elite
Oct 31
Seattle, United States
46% AI deal score
$423
$417
Save $6
From BOI
Elite
Oct 27
Seattle, United States
45% AI deal score
$417
From BOI
Elite
Oct 24
Seattle, United States
45% AI deal score
$417
From BOI
Elite
Oct 13
Seattle, United States
45% AI deal score
$437
From BOI
Elite
Jun 19
Seattle, United States
43% AI deal score
$1,026
$962
Save $64
From BOI
Elite
Jul 21
Seattle, United States
43% AI deal score
$1,108
$1,043
Save $65
From BOI
Elite
Jul 28
Seattle, United States
41% AI deal score
$1,106
$1,088
Save $18
From BOI
Elite
Jul 14
Seattle, United States
40% AI deal score
$447
From BOI
Elite
Oct 08
Seattle, United States
29% AI deal score
$4,796