Seattle to Helena (SEA–HLN) — Airlines, Schedules & Connections

SEA Airport Page →
490 mi airlines 7/wk
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Flight Schedule 2 flights Verified 4h ago
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  Flight Airline AC Dep Arr Dur OTP Sched  
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AS2040
AS Alaska
E75
1:21 PM
MDT
3:59 PM
MDT
1h 38m
—
M T W T F S S
Prices
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←
AS2040
AS Alaska
E75L
4:36 PM
MDT
5:26 PM
MDT
1h 50m
—
M T W T F S S
Prices

No flights match your filters.

No nonstop flights on this route. connecting options below.

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Seattle to Helena
1 carrier, 7 flights/week nonstop.
1 Airlines 7 Flights/wk 490 mi 1h 38m nonstop 3 1-stop hubs

SEA–HLN is served by 1 airline with nonstop service. Alaska Airlines leads the route. The flight covers 490 miles in approximately 1h 38m. Beyond nonstop, 3 hubs offer 1-stop connections.

Also explore SEA Routes HLN Routes SEA Live Flights HLN Live Flights SEA Delays
Carriers on this route

Airline Landscape

All carriers operating nonstop SEA–HLN service, compared side by side.
Airline Freq/wk Aircraft Duration Dep OTP Alliance Codeshares
AS Alaska Airlines 7 E75 1h38 50% Oneworld –
Aircraft on this route
E75 Embraer E175 – AS
Alliance coverage
Oneworld: AS (7 flights/wk, 100%)
OTP based on airport-level delay snapshots. Duration ranges reflect seasonal/directional variation.
Schedule

Weekly Schedule Pattern

Nonstop flight frequency by day of week, SEA to HLN direction.
Mon
1
flight
Tue
1
flight
Wed
1
flight
Thu
1
flight
Fri
1
flight
Sat
1
flight
Sun
1
flight
Departure time distribution
12 AM6 AM12 PM6 PM12 AM
Morning departures
Afternoon/evening departures
1
Nonstop flights
7
Outbound / wk
7
Return / wk
Connections

Connection Landscape

Beyond nonstop. 1-stop and 2-stop options for SEA to HLN.
1-STOP
One-Stop Connections
3
Hubs
~5h
Fastest
~16h
Longest
SJC ~5h 31m DEN ~14h 30m SLC ~16h 26m
Verified with published schedule alignment and minimum connection time.
2-STOP
Two-Stop Connections
184
Candidates
Two-stop connections loaded in the connections tab above.
Connections computed from published schedules with minimum connection time verification. Use the interactive explorer above the fold to filter by airline, tier, and layover time.
Reliability

On-Time Performance

What to expect at each end of your journey.
Outbound
SEA → HLN
50%
Frequent delays expected. Consider flexible booking.
Departing
50%
Return
HLN → SEA
100%
Generally reliable. Most flights run on time.
Arriving
100%
OTP = percentage of flights arriving within 15 min of schedule. Based on airport-level delay snapshots. SEA delays →
Know before you go

Travel Essentials

Practical planning for this route.
Time Difference
0h
Helena is 0 hours the same as Seattle.
SEA: MDT · HLN: MDT

When it's 6:00 PM in Seattle, it's 6:00 PM in Helena.
Distance & Flight Time
490 mi / 788 km
Nonstop flight time is approximately 1h 38m.
Getting to SEA

Link Light Rail runs from downtown Seattle (Westlake station) to the airport in 38 minutes ($3.50 peak). Trains run every 6–12 minutes during peak hours from 5am to 1am. Ride-shares run $30–50 from downtown; SR-99 and I-5 can be heavily congested southbound during afternoon rush (3–7pm).

Sound Transit 574 express bus serves Tacoma ($2.50–4). Sounder commuter rail connects Tacoma to the airport area via a shuttle.

Facts

SEA–HLN Quick Facts

Key statistics for the Seattle to Helena route.
Route details
Distance490 mi / 788 km
Flight time1h 38m
Time difference0 hours
Airlines (nonstop)1
Weekly flights7 out / 7 return
1-stop connections3 hubs
Origin: SEA
Full nameSeattle–Tacoma International Airport
IATA / ICAOSEA / KSEA
TimezoneAmerica/Boise
Passengers/yr52.6M
Elevation433 ft / 132 m
Destination: HLN
Full nameHelena Regional Airport
IATA / ICAOHLN / KHLN
TimezoneAmerica/Boise
Passengers/yr0.2M
Elevation3,877 ft / 1,182 m
FAQ

Frequently Asked Questions

Common questions about SEA to HLN flights.
Nonstop flights from Seattle–Tacoma International Airport to Helena Regional Airport take approximately 1h 38m. The route covers 490 miles.
1 airline operates nonstop service: Alaska Airlines.
There are approximately 7 nonstop flights per week from SEA to HLN. The return direction has about 7 weekly flights.
Yes, 1-stop connections are available through SJC, DEN and SLC. These options provide additional schedule flexibility.
Yes, return flights from HLN to SEA are available. Use the direction toggle at the top to view the return schedule.
Click the 'Search Flights' button to check availability and prices on Google Flights. You can also compare airlines and schedules on this page to find the best option.
See the On-Time Performance section for the latest delay data at both airports. This shows departure and arrival reliability to help you plan.
Route data is updated regularly from official airline schedules. On-time performance data comes from recent airport delay snapshots.

Flights from SEA to HLN

Seattle–Tacoma International Airport (SEA) and Helena Regional Airport (HLN) are connected by nonstop service from Alaska Airlines. With 7 weekly departures, this is a regularly served route.

SEA to HLN Flight Duration and Schedule

Nonstop flight time from SEA to HLN ranges from 1 hours 38 minutes. The route covers a distance of 490 miles (788 km). There are approximately 7 weekly flights outbound and 7 return, totaling 14 flights per week in both directions.

Connecting Options and Alternatives

3 one-stop connections are available, with the fastest taking approximately 5 hours via SJC. Two-stop connections are also available via intermediate hubs.