What is the cheapest airline that flies from Seattle/Tacoma Intl to Petersburg?

Alaska Airlines is the most popular carrier operating from Seattle/Tacoma Intl to Petersburg

How many flights depart from Seattle to Petersburg, Alaska on average per week?

As of February 2026, 2 flights take off from Seattle and land in Petersburg, Alaska each week. The most common flight departure day for this route is Mon, with 50% of weekly flights taking off on this day.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Petersburg Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Petersburg Airport were last updated today.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Petersburg Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Petersburg Airport is 1 as of February 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Petersburg Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Petersburg Airport.

What documentation or ID do you need to fly to Petersburg Airport?

The travel and health documents you'll need for your trip to Petersburg Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Petersburg Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$227 Cheap Flights from Seattle to Petersburg in 2026

1 adult

0 bags

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Seattle to Petersburg

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:41 pm - 10:44 am

SEA

PSG

17h 03m

1 stop

3:10 pm - 8:39 pm

PSG

SEA

4h 29mnonstop

$448Alaska Airlines

Thu, Apr 9 - Wed, Apr 15

7:00 am - 10:44 am

SEA

PSG

4h 44m

2 stops

2:53 pm - 8:17 pm

PSG

SEA

4h 24m

2 stops

$450Alaska Airlines

Fri, Apr 17 - Fri, Apr 24

7:00 am - 2:25 pm

SEA

PSG

8h 25m

1 stop

3:10 pm - 8:39 pm

PSG

SEA

4h 29m

2 stops

$455Alaska Airlines

Thu, Apr 9 - Wed, Apr 15

11:25 pm - 2:25 pm

SEA

PSG

16h 00m

1 stop

2:53 pm - 8:17 pm

PSG

SEA

4h 24mnonstop

$456Alaska Airlines

Fri, Apr 17 - Fri, Apr 24

6:41 pm - 10:44 am

SEA

PSG

17h 03m

1 stop

11:29 am - 5:44 pm

PSG

SEA

5h 15m

1 stop

$458Alaska Airlines

Thu, Apr 9 - Wed, Apr 15

7:00 am - 2:25 pm

SEA

PSG

8h 25m

1 stop

2:53 pm - 8:17 pm

PSG

SEA

4h 24m

2 stops

$459Alaska Airlines

Fri, Apr 17 - Fri, Apr 24

7:00 am - 2:25 pm

SEA

PSG

8h 25m

1 stop

11:29 am - 9:33 pm

PSG

SEA

9h 04m

1 stop

$469Alaska Airlines

Tue, Mar 24 - Tue, Mar 31

7:00 am - 2:25 pm

SEA

PSG

8h 25m

1 stop

11:30 am - 10:30 am

PSG

SEA

22h 00m

1 stop

$470Alaska Airlines

Fri, Apr 17 - Fri, Apr 24

7:00 am - 10:43 am

SEA

PSG

4h 43mnonstop

2:55 pm - 8:26 pm

PSG

SEA

4h 31mnonstop

$592Alaska Airlines

Sat, Jun 20 - Sat, Jun 27

7:00 am - 10:43 am

SEA

PSG

4h 43mnonstop

2:55 pm - 9:50 pm

PSG

SEA

5h 55m

1 stop

$596Alaska Airlines

Sat, Jun 20 - Sat, Jun 27

Alaska Airlines flights from Seattle to Petersburg, Alaska

Our best Alaska Airlines deals on Seattle to Petersburg, Alaska flight tickets

Alaska Airlines

Apr 9

SEA6:41 pmSeattle/Tacoma Intl

17h 03m

1 stop

PSG10:44 amPetersburg

Apr 15

PSG3:10 pmPetersburg

4h 29m

SEA8:39 pmSeattle/Tacoma Intl

$448

Alaska Airlines

Apr 17

SEA7:00 amSeattle/Tacoma Intl

4h 44m

2 stops

PSG10:44 amPetersburg

Apr 24

PSG2:53 pmPetersburg

4h 24m

2 stops

SEA8:17 pmSeattle/Tacoma Intl

$450

Alaska Airlines

Apr 9

SEA7:00 amSeattle/Tacoma Intl

8h 25m

1 stop

PSG2:25 pmPetersburg

Apr 15

PSG3:10 pmPetersburg

4h 29m

2 stops

SEA8:39 pmSeattle/Tacoma Intl

$455

momondo Fare Finder

Use the filters below to find and compare flights from Seattle to Petersburg, Alaska that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Thu 4/9

6:41 pm-10:44 am

1 stop17h 03m

Petersburg

Wed 4/15

3:10 pm-8:39 pm

Nonstop4h 29m

$448

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Fri 4/17

7:00 am-10:44 am

2 stops4h 44m

Petersburg

Fri 4/24

2:53 pm-8:17 pm

2 stops4h 24m

$450

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Thu 4/9

7:00 am-2:25 pm

1 stop8h 25m

Petersburg

Wed 4/15

3:10 pm-8:39 pm

2 stops4h 29m

$455

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Fri 4/17

11:25 pm-2:25 pm

1 stop16h 00m

Petersburg

Fri 4/24

2:53 pm-8:17 pm

Nonstop4h 24m

$456

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Thu 4/9

6:41 pm-10:44 am

1 stop17h 03m

Petersburg

Wed 4/15

11:29 am-5:44 pm

1 stop5h 15m

$458

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Fri 4/17

7:00 am-2:25 pm

1 stop8h 25m

Petersburg

Fri 4/24

2:53 pm-8:17 pm

2 stops4h 24m

$459

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Tue 3/24

7:00 am-2:25 pm

1 stop8h 25m

Petersburg

Tue 3/31

11:29 am-9:33 pm

1 stop9h 04m

$469

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Fri 4/17

7:00 am-2:25 pm

1 stop8h 25m

Petersburg

Fri 4/24

11:30 am-10:30 am

1 stop22h 00m

$470

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Sat 6/20

7:00 am-10:43 am

Nonstop4h 43m

Petersburg

Sat 6/27

2:55 pm-8:26 pm

Nonstop4h 31m

$592

SeattlePetersburg

SEA - PSG

SEAPSG

Seattle/Tacoma Intl

Sat 6/20

7:00 am-10:43 am

Nonstop4h 43m

Petersburg

Sat 6/27

2:55 pm-9:50 pm

1 stop5h 55m

$596

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 18 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Petersburg, Alaska

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Other information

What is the cheapest day to depart on your flight to Petersburg, Alaska?

The cheapest day to depart on your flight to Petersburg, Alaska is on a Friday when prices can be found for as low as $512. This is often the case because there is less demand to fly during this day of the week. Flights from Seattle to Petersburg, Alaska on a Wednesday will generally be more expensive and average around $808. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest Seattle/Tacoma Intl to Petersburg flight route?

Fly from Seattle/Tacoma Intl to Petersburg for the best Seattle/Tacoma Intl - Petersburg flight prices

What cabin class options are available on Seattle/Tacoma Intl to Petersburg flights?

There is only 1 cabin class available to choose from on Seattle/Tacoma Intl to Petersburg flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Seattle to Petersburg, Alaska flights?

You could potentially save up to 42% on your flight if you consider stops on a Seattle to Petersburg, Alaska flight.

When to book flights from Seattle to Petersburg, Alaska

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Petersburg, Alaska according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Petersburg, Alaska (SEA to PSG) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Petersburg, Alaska

Fastest flight time	4h 43m
Direct flights	Wed, Fri, Sat and Sun
Airports in Petersburg, Alaska	1 airport

The fastest flight from Seattle to Petersburg, Alaska takes 4h 43m

Direct flights go from Seattle to Petersburg, Alaska on Wednesday, Friday, Saturday and Sunday. There are no airlines offering direct flights.

There is 1 airport in Petersburg, Alaska. From Seattle there are direct flights to Petersburg (PSG).

Search flight deals

How far is Seattle/Tacoma Intl to Petersburg by plane?
The distance between Seattle/Tacoma Intl and Petersburg is about 776.0 mi. Typically, this will take 4h 43m by plane in normal conditions.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Petersburg Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Petersburg Airport were last updated today.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Petersburg Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Petersburg Airport is 1 as of February 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Petersburg Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Petersburg Airport.
What documentation or ID do you need to fly to Petersburg Airport?
The travel and health documents you'll need for your trip to Petersburg Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Petersburg Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular plane model from Seattle to Petersburg, Alaska?
momondo data reveals that the most frequently booked plane model on the route from Seattle to Petersburg, Alaska is Boeing 737-700 Passenger/BBJ1 (winglets), representing 50.00% of all bookings. The subsequent popular model is Boeing 737-700 at 50.00%.
What is the most popular airline from Seattle to Petersburg, Alaska?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Seattle to Petersburg, Alaska is Alaska Airlines (100% of total bookings).

Best airlines flying from Seattle to Petersburg, Alaska

Compare and see reviews for airlines that fly from Seattle to Petersburg, Alaska with momondo

Airline	Rating	Free Cancellation	Price
Alaska Airlines	PriceFrom $463	Free Cancellation	Rating 8.0 11,948 reviews		Search Alaska Airlines flights

Alaska Airlines Flights From Seattle to Petersburg, Alaska
Alaska Airlines flies from Seattle to Petersburg, Alaska around 2 times per week, with 11,948 momondo users rating the airline 8.0/10. The cheapest Alaska Airlines deal from Seattle to Petersburg, Alaska in the last 72 hours was $463 (round-trip), much lower than the average airfare cost of $607 for Alaska Airlines flights on this route.

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Petersburg?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Petersburg. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Petersburg with flexible booking policies on momondo?

Flights from Seattle to Petersburg with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Seattle to Petersburg?

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Petersburg from Seattle.

I’m not ready to book a flight from Seattle to Petersburg right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Petersburg from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.