$139 Find Cheap Flights from Helena to Seattle - Compare and Save

Among airlines operating Helena to Seattle flights:

• Alaska Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

Only Alaska Airlines operates flights between Helena and Seattle.

Flights from Helena to Seattle usually depart from Helena (HLN) and arrive at Seattle/Tacoma Intl (SEA).

Here are some options for this route, based on selected ticket types and cabin classes:

• Alaska Airlines: a cabin bag and a checked bag in Economy Class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Only Economy Class is available on flights from Helena to Seattle.

On this route, nonstop flights are cheaper than layover options on average. Nonstop fares average $225 round-trip, compared to $379 via a layover through Salt Lake City (SLC).

The Embraer 175 family is used most often on this route, operated mainly by Alaska Airlines and Hawaiian Airlines. Other aircraft seen on the route include Embraer 175 (Enhanced Winglets) variants.

Most connecting flights from Helena to Seattle pass through Salt Lake City (SLC), which handles 100% of one-stop traffic on this route. Other layover airports each see under 5%.

Yes. Being flexible with your travel dates can save you up to 58% on the Helena to Seattle route. Wednesday is the cheapest departure day at $187 round-trip on average, while Tuesday is the most expensive at $438, a difference of $251. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Evening is the busiest departure period on Helena to Seattle flights, with 100% of flights leaving in that window. Morning departures account for 0%, afternoon flights for 0%, and night flights for 0%.

Some of the most popular sights in Seattle are Pike Place Market, Pier 66 and Lumen Field. These are among the most viewed places in Seattle on KAYAK.

A nonstop flight from Helena to Seattle takes 1h 55m, covering 489 miles.

These are the earliest and latest flight times available from Helena to Seattle:

• Earliest: departs at 4:41 pm and lands at 6:36 pm
• Latest: departs at 5:34 pm and lands at 7:29 pm.

The flight takes about 1h 55m.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $217 to $1,415. That means the highest observed fare was about 7x higher than the lowest one.

One-way fares from Helena to Seattle are currently lower than usual. Average one-way flight prices are about $140, which is 47% below the typical average for this route.

Seattle is 1 hour behind Helena (Pacific Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
· Fox
· Europcar
· Thrifty
· Budget
· Dollar

Round-trip flights from Helena to Seattle range from $177 to $377, with an average of $222 over the past 12 months. Anything below $177 counts as a good deal.

Alaska Airlines is the only airline on the Helena to Seattle route offering in-flight Wi-Fi. Pricing depends on fare class.