Find Cheap Flights from Portland to Seattle/Tacoma Intl (PDX - SEA)

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Good to Know

Low Season:
December
Best time to beat the crowds
3%
expected price decrease
High Season:
April
Most popular time to fly
8%
expected price increase
Average Price:
$295
(avg. price over the last 2 weeks)
Good Deal:
$154
or less (round trip)

When to Book Flights from Portland to Seattle/Tacoma Intl

Average price per month
Flight prices as travel date approaches
-1 day
-2 days

Top tips for Finding a Cheap Flight

Looking for a cheap flight? 25% of our users found flights on this route for $154 or less.
The cheapest flight from Portland to Seattle/Tacoma Intl was found 43 days before departure, on average.
Book at least 3 weeks before departure in order to get a below-average price.
High season is considered to be March, April and May. The cheapest month to fly is December.
Morning departure is around 2% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

FAQs for Booking Portland to Seattle/Tacoma Intl Flights

How long does a flight from Portland to Seattle/Tacoma Intl take?
An average nonstop flight takes 0h 57m, covering a distance of 130 miles.
How many flights are there between Portland and Seattle/Tacoma Intl?
There are 1,113 (nonstop) flights between Portland and Seattle/Tacoma Intl per week, averaging 167 per day.
Which airlines provide the cheapest flights from Portland to Seattle/Tacoma Intl?
In the past 3 days, the cheapest round-trip tickets were found on Delta ($127)
Do I need a passport to fly between Portland and Seattle/Tacoma Intl?
No.
Which airlines fly most frequently between Portland and Seattle/Tacoma Intl?
Alaska Airlines (61 times daily), American Airlines (28 times daily), Delta (17 times daily) are the most frequent flyers on this route.
What’s the cheapest day of the week to fly Portland to Seattle/Tacoma Intl?
For Portland to Seattle/Tacoma Intl, Saturday is the cheapest day to fly on average and Friday is the most expensive. Flying from Seattle/Tacoma Intl back to Portland, the best deals are generally found on Thursday, with Friday being the most expensive.

Book cheap flights from Portland to Seattle/Tacoma Intl (round-trip)

Airports
Origin
Portland
$127
only
$127
Destination
Seattle
$127
only
$127
Sat, Mar 3
PDX
SEA
1h 00m
Tue, Mar 6
SEA
PDX
0h 55m
Trip: 4 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
DTW
ATL
Excellent 8.0

I love Delta, especially their newer planes that have screens in the backs of headrests and free movies.

Leg room is never enough. I'm 6'1".

BOS
AUS
Good 6.0

Delayed so I was not home until middle of the night.

CMH
ATL
Okay 5.0

As poltronas estavam OK.

No voo MEX-GRU o Sistema de Entretenimento nao funcionou por quase 3hs. A refeicao foi muito fraca, tamto no jantar quanto no café da manhã. Onde ja se viu comer feijão preto com onelete no cafe da manhã??? Deveriam pensar no tipo de passageiro q estao atendendo.

ATL
BWI
Okay 4.6

Snacks & beverages on a 1 hour flight. Very nice crew

Older plane, no entertainment

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

Sat, Apr 7
PDX
SEA
0h 57m
Sat, Apr 14
SEA
PDX
0h 51m
Trip: 8 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
MEX
ATL
Good 7.0

Beautiful plane, great entertainment system, two bathrooms for economy class, decent food

DTW
ATL
Excellent 8.0

I love Delta, especially their newer planes that have screens in the backs of headrests and free movies.

Leg room is never enough. I'm 6'1".

DFW
LGA
Excellent 10.0

Good service, more leg room than American Airlines.

Everything was good.

PDX
SEA
Good 7.0

Snacks if possible

ATL
MBJ
Excellent 8.0

I love Delta, especially their newer planes that have screens in the backs of headrests and free movies.

Leg room is never enough. I'm 6'1".

Wed, Apr 18
PDX
SEA
0h 57m
Wed, May 2
SEA
PDX
1h 10m
Trip: 15 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
MEX
ATL
Good 7.0

Beautiful plane, great entertainment system, two bathrooms for economy class, decent food

BOS
AUS
Good 6.0

Delayed so I was not home until middle of the night.

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

PDX
SEA
Good 6.3

Getting to the correct destination.

The fact that the lack of knowledge regarding international travel visas by the counter staff and supervisor meant that two days of the vacation were lost. Upon arrival in China the 144 hour travel visa was granted with no problem within minutes, but the U.S. staff was completely befuddled by the possibility. The interrogation was completely stressful and resulted in a reschedule of the original flight and during the second attempt at flying even an email from the U.S. consulate with a link to the Shanghai/Chinese government immigration site was deemed "not official enough". i will be expecting proper compensation. I was once given an $850 travel voucher for voluntarily giving up my seat, and was flown first class to Hawaii, given 4 star accomodation and then flown first class on to China within 48 hours. This was an involuntary bump from our chosen flight time, all because of a lack of knowledge about current visa regulations and international law on the part of the check in staff. We have been loyal Delta users for over 15 years, and this was the biggest blunder ever. Also humiliating and extremely frustrating, stressful and a big problem with fulfilling our travel plans between son and father.

Mon, Jun 4
PDX
SEA
0h 57m
Sat, Jun 9
SEA
PDX
0h 58m
Trip: 6 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
DTW
ATL
Excellent 8.0

I love Delta, especially their newer planes that have screens in the backs of headrests and free movies.

Leg room is never enough. I'm 6'1".

ATL
MBJ
Excellent 8.0

I love Delta, especially their newer planes that have screens in the backs of headrests and free movies.

Leg room is never enough. I'm 6'1".

PDX
SEA
Good 7.0

Snacks if possible

DFW
LGA
Excellent 10.0

Good service, more leg room than American Airlines.

Everything was good.

BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

Wed, Jan 31
PDX
SEA
1h 05m
Wed, Feb 7
SEA
PDX
0h 58m
Trip: 8 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
PDX
SEA
Mediocre 2.0

Gate attendant was extraordinarily rude

ATL
BWI
Okay 4.6

Snacks & beverages on a 1 hour flight. Very nice crew

Older plane, no entertainment

MEX
ATL
Good 7.0

Beautiful plane, great entertainment system, two bathrooms for economy class, decent food

BOS
AUS
Good 6.0

Delayed so I was not home until middle of the night.

PDX
SEA
Good 6.3

Getting to the correct destination.

The fact that the lack of knowledge regarding international travel visas by the counter staff and supervisor meant that two days of the vacation were lost. Upon arrival in China the 144 hour travel visa was granted with no problem within minutes, but the U.S. staff was completely befuddled by the possibility. The interrogation was completely stressful and resulted in a reschedule of the original flight and during the second attempt at flying even an email from the U.S. consulate with a link to the Shanghai/Chinese government immigration site was deemed "not official enough". i will be expecting proper compensation. I was once given an $850 travel voucher for voluntarily giving up my seat, and was flown first class to Hawaii, given 4 star accomodation and then flown first class on to China within 48 hours. This was an involuntary bump from our chosen flight time, all because of a lack of knowledge about current visa regulations and international law on the part of the check in staff. We have been loyal Delta users for over 15 years, and this was the biggest blunder ever. Also humiliating and extremely frustrating, stressful and a big problem with fulfilling our travel plans between son and father.

Fri, Jan 26
PDX
SEA
1h 05m
Sun, Jan 28
SEA
PDX
1h 02m
Trip: 3 days
8.1ExcellentShow reviews
Overall 8.1 Excellent
Based on 14 reviews
Overall
8.0
Boarding
8.1
Comfort
7.7
Crew
8.4
Entertainment
7.5
Food
7.3
BNA
BOS
Mediocre 2.0

Delta staff taking care of rude/beligerant guests first vedore guests patiently/kindly waiting in line ... children watched that behavior and the jerks recieved special treatment. Flight staff ripped up guests boarding pass in face. Staff allowed ys to board plane and put our bags under plane and then crew timed out before take off. Never will use Delta again.

PDX
SEA
Good 6.3

Getting to the correct destination.

The fact that the lack of knowledge regarding international travel visas by the counter staff and supervisor meant that two days of the vacation were lost. Upon arrival in China the 144 hour travel visa was granted with no problem within minutes, but the U.S. staff was completely befuddled by the possibility. The interrogation was completely stressful and resulted in a reschedule of the original flight and during the second attempt at flying even an email from the U.S. consulate with a link to the Shanghai/Chinese government immigration site was deemed "not official enough". i will be expecting proper compensation. I was once given an $850 travel voucher for voluntarily giving up my seat, and was flown first class to Hawaii, given 4 star accomodation and then flown first class on to China within 48 hours. This was an involuntary bump from our chosen flight time, all because of a lack of knowledge about current visa regulations and international law on the part of the check in staff. We have been loyal Delta users for over 15 years, and this was the biggest blunder ever. Also humiliating and extremely frustrating, stressful and a big problem with fulfilling our travel plans between son and father.

ATL
MEX
Excellent 8.3

Tudo conforme esperado em um voo da Delta.

Nada a reclamar.

CMH
ATL
Okay 5.0

As poltronas estavam OK.

No voo MEX-GRU o Sistema de Entretenimento nao funcionou por quase 3hs. A refeicao foi muito fraca, tamto no jantar quanto no café da manhã. Onde ja se viu comer feijão preto com onelete no cafe da manhã??? Deveriam pensar no tipo de passageiro q estao atendendo.

PDX
SEA
Good 7.0

Snacks if possible

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Portland to Seattle/Tacoma Intl Flight Information

Avg. Flight Duration 0h 59m
Flights Arrive in Seattle/Tacoma Intl
Flights Depart from Portland
Flight Price $127
Distance 130 miles
Airlines Delta
*
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The fares displayed include all taxes and fees for economy class travel and were found by the provider in the last 72 hours. Seats are limited and may not be available on all flights and days. Fares are subject to change and may not be available on all flights or dates of travel. Some carriers charge additional fees for extra checked bags. Please check the carriers' sites.