Delta Air Lines flights from BOI to SEA
Find comprehensive Delta Air Lines flight information, schedules, and booking details for direct flights from BOI to SEA. Delta Air Lines operates 10-15 flights daily flights on this route.• Flight Duration: 1h 25m - 2h 11m (average flight time)• Distance: 400 miles (644 km) (air miles between airports)• Daily Flights: 10-15 flights (scheduled departures per day)
BOI
SEA
FLIGHT TIME
1h 25m - 2h 11m
FLIGHT DISTANCE
400 miles (644 km)
1h 40m - 2h 11m
05:20
19:45
400 miles (644 km)
January
1 (Show)
96
Delta Air Lines Flight Schedule from BOI to SEA
| Flight | Airline | Departure | Arrival | Aircraft |
|---|---|---|---|---|
DL3775 |  Delta Air Lines | 05:20 | 06:18:00 | Embraer 175 (Enhanced Winglets) |
DL3678 | Delta Air Lines | 07:30 | 08:28:00 | Embraer 175 (Enhanced Winglets) |
DL3740 | Delta Air Lines | 09:00 | 10:11:00 | Embraer 175 (Enhanced Winglets) |
DL3712 | Delta Air Lines | 11:42 | 12:35:00 | Embraer 175 (Enhanced Winglets) |
DL4127 | Delta Air Lines | 13:50 | 14:42:00 | Embraer 175 (Enhanced Winglets) |
DL3594 | Delta Air Lines | 16:45 | 17:25:00 | Embraer 175 (Enhanced Winglets) |
DL3688 | Delta Air Lines | 19:45 | 20:38:00 | Embraer 175 (Enhanced Winglets) |
Delta Air Lines Monthly Flight Calendar
December 2025
Route Insights
Duration variability: Flight duration on this route can vary based on aircraft type, wind conditions, and airline scheduling. Average duration is 1h 25m - 2h 11m.
Pricing patterns: January typically offers lower prices due to reduced demand outside peak travel seasons.
Best departure times: Peak departure times are 5:00, 7:00, 9:00, offering more flight options and potentially better connections.
BOI - SEA flight price statistics
$186
ApproximateThe numbers are average prices found based on user searches for direct flights between the airports. It's calculated from the cheapest prices found per month for a round-trip with 1 adult and can vary depending on the amount of data we have for this particular route.
$136
Jan$263
Feb$163
Mar$163
Apr$478
May$138
Jun$138
Jul$138
Aug$138
Sep$138
Oct$138
Nov$198
DecDelta Air Lines Terminal Information
Terminal information for Delta Air Lines on this route is currently being updated. Please check back soon or contact the airports directly for terminal details.
Frequently Asked Questions about Delta Air Lines Flights
How many Delta Air Lines flights operate from BOI to SEA?
Delta Air Lines operates 7 flights from BOI to SEA.
What city does SEA airport serve?
SEA airport serves SeaTac.
How long is the Delta Air Lines flight from BOI to SEA?
The flight duration is approximately 1h 25m - 2h 11m.
What is the distance from BOI to SEA?
The distance is 400 miles (644 km).
What aircraft does Delta Air Lines use on this route?
Delta Air Lines uses Embraer 175 (Enhanced Winglets) on this route.
Which other airlines operate on this route?
1 other airline operates on this route: Alaska Airlines.
What are the earliest and latest Delta Air Lines flight departure times?
The earliest Delta Air Lines flight departs at 05:20 and the latest departs at 19:45.
What is the cheapest month to fly Delta Air Lines from BOI to SEA?
January is typically the cheapest month to fly Delta Air Lines on this route.
What is the average price for a Delta Air Lines flight from BOI to SEA?
The average price for a round-trip Delta Air Lines flight on this route is approximately $186. Prices can vary based on booking time and demand.
How many Delta Air Lines flights operate per week on this route?
Delta Air Lines operates approximately 96 flights per week from BOI to SEA.