$89+ Cheap flights from Portland to Seattle (PDX - SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/5. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — SEA
Oct 5 — Oct 121
Round-trip
1 adult, Economy
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Find cheap flights from Portland to Seattle with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Portland to Seattle/Tacoma Intl are usually found in January or December, booked 55 days in advance, depart on a Thursday or Friday and return on a Wednesday
Cheap flight deals from Portland to Seattle
Cheapest
Best
Last-minute
One-way
Cheapest flights from Portland to SeattleExplore the most affordable flight options available from Portland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
Explore the most affordable flight options available from Portland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 5, 2026.
This SmartFares deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:09 am -
Nonstop1h 16m
Tue 10/2012:13 pm -
Nonstop1h 11m
Deal found 9/5![Alaska Airlines logo]()
$103
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:10 am -
Nonstop1h 19m
Tue 10/207:32 am -
Nonstop1h 14m
Deal found 9/4![Delta logo]()
$117
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:44 pm -
Nonstop1h 21m
Sun 10/47:30 am -
Nonstop1h 13m
Deal found 9/5![Delta logo]()
$118
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:41 pm -
Nonstop1h 10m
Sat 10/36:39 am -
1 stop6h 53m
Deal found 9/5![Alaska Airlines logo]()
$160
This Flightnetwork deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:03 am -
1 stop16h 07m
Sun 10/47:20 am -
Nonstop1h 08m
Deal found 9/5![Alaska Airlines logo]()
$161
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:10 am -
Nonstop1h 19m
Fri 10/97:32 am -
Nonstop1h 14m
Deal found 9/4![Delta logo]()
$177
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:08 pm -
1 stop14h 54m
Mon 10/268:48 pm -
1 stop12h 35m
Deal found 9/5![Alaska Airlines logo]()
$183
Best flights from Portland to SeattleDiscover carefully curated flight deals from Portland to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
Discover carefully curated flight deals from Portland to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 5, 2026.
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:10 am -
Nonstop1h 19m
Tue 10/209:36 am -
Nonstop1h 09m
Deal found 9/4![Delta logo]()
$117
This Alaska Airlines deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/57:40 pm -
Nonstop1h 00m
Sat 12/1211:31 am -
1 stop5h 19m
Deal found 8/31![Alaska Airlines logo]()
$210
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:10 am -
Nonstop1h 19m
Fri 10/97:32 am -
Nonstop1h 14m
Deal found 9/4![Delta logo]()
$177
This Delta deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/1712:29 pm -
Nonstop1h 10m
Sat 10/244:00 pm -
Nonstop1h 04m
Deal found 9/1![Delta logo]()
$217
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/178:09 am -
Nonstop1h 01m
Tue 10/209:10 am -
1 stop4h 40m
Deal found 9/4![Alaska Airlines logo]()
$240
This Delta deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/73:31 pm -
Nonstop1h 14m
Thu 10/2910:37 am -
Nonstop1h 12m
Deal found 8/31![Delta logo]()
$227
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/195:48 pm -
1 stop5h 15m
Mon 10/267:20 am -
Nonstop1h 08m
Deal found 9/4![Alaska Airlines logo]()
$250
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 1/1212:00 pm -
Nonstop0h 57m
Tue 4/138:55 am -
1 stop4h 42m
Deal found 9/1![Alaska Airlines logo]()
$255
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/149:31 am -
Nonstop0h 58m
Thu 4/1511:31 am -
1 stop5h 19m
Deal found 9/1![Alaska Airlines logo]()
$260
This Alaska Airlines deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 1/910:59 am -
1 stop8h 54m
Tue 4/138:55 am -
1 stop4h 42m
Deal found 9/1![Alaska Airlines logo]()
$263
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/237:03 am -
1 stop12h 04m
Wed 9/308:43 pm -
1 stop13h 04m
Deal found 9/2![Alaska Airlines logo]()
$263
Last-minute flights from Portland to SeattleDiscover last-minute flight deals from Portland to Seattle. Data last updated September 5, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Seattle. Data last updated September 5, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/18:44 pm -
Nonstop1h 21m
Sun 10/47:30 am -
Nonstop1h 13m
Deal found 9/5![Delta logo]()
$118
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/15:41 pm -
Nonstop1h 10m
Sat 10/36:39 am -
1 stop6h 53m
Deal found 9/5![Alaska Airlines logo]()
$160
This Flightnetwork deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:03 am -
1 stop16h 07m
Sun 10/47:20 am -
Nonstop1h 08m
Deal found 9/5![Alaska Airlines logo]()
$161
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/87:10 am -
Nonstop1h 19m
Fri 10/97:32 am -
Nonstop1h 14m
Deal found 9/4![Delta logo]()
$177
This SmartFares deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/177:09 am -
Nonstop1h 16m
Tue 10/2012:13 pm -
Nonstop1h 11m
Deal found 9/5![Alaska Airlines logo]()
$103
This Alaska Airlines deal was found by Cheapflights users on 9/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/198:08 pm -
1 stop14h 54m
Mon 10/268:48 pm -
1 stop12h 35m
Deal found 9/5![Alaska Airlines logo]()
$183
One-way flights from Portland to SeattleSearch for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
Search for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated September 5, 2026.
This Delta deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/55:59 pm -
Nonstop1h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Delta logo]()
$89
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/308:08 pm -
1 stop11h 18m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$97
This Priceline deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/267:18 am -
1 stop5h 58m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$102
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/110:30 am -
1 stop11h 43m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$107
This Priceline deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/72:50 pm -
1 stop6h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Alaska Airlines logo]()
$112
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:53 pm -
1 stop5h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$119
This Alaska Airlines deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/49:50 pm -
1 stop11h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Alaska Airlines logo]()
$124
This Trip.com deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/32:35 pm -
1 stop7h 25m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Alaska Airlines logo]()
$125
This Expedia deal was found by Cheapflights users on 9/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/249:21 am -
1 stop5h 35m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/1![Alaska Airlines logo]()
$127
This Booking.com deal was found by Cheapflights users on 8/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:07 am -
Nonstop0h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 8/31![Alaska Airlines logo]()
$129
This Kiwi.com deal was found by Cheapflights users on 9/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/512:02 pm -
1 stop27h 10m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/4![Frontier logo]()
$130
This Alaska Airlines deal was found by Cheapflights users on 9/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:50 pm -
1 stop6h 13m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 9/2![Alaska Airlines logo]()
$132
Find flight deals from Portland to Seattle
Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated September 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $103 (SmartFares) |
One-way from | $89 (Delta) |
Popular in | March |
Cheapest in | January |
Average price | $277 |
Good round-trip deal | $258 or less |
Good one-way deal | $194 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Portland to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 5, 2026.
Use the filters below to find and compare flights from Portland to Seattle that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Quickest round-trip
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Thu 3/4
7:40 pm-8:50 pm
Nonstop1h 10m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$89
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Wed 3/3
7:00 am-1:38 pm
1 stop6h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$102
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Wed 12/2
7:00 am-1:38 pm
1 stop6h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$102
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Sat 10/17
7:10 am-8:29 am
Nonstop1h 19m
Seattle/Tacoma Intl
Tue 10/20
9:36 am-10:45 am
Nonstop1h 09m
$117
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Mon 11/2
2:50 pm-9:03 pm
1 stop6h 13m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Tue 3/2
7:00 am-1:38 pm
1 stop6h 38m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Wed 11/4
7:04 am-2:28 pm
1 stop7h 24m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Sat 2/27
2:30 pm-10:13 pm
1 stop7h 43m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$132
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Thu 10/1
7:03 am-11:10 pm
1 stop16h 07m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$137
PortlandSeattle
PDX Portland - SEA Seattle/Tacoma Intl
PDXSEA
Portland
Tue 11/3
3:31 pm-4:45 pm
Nonstop1h 14m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$139
Showing 1-10 of 22 resultsSorted by cheapest first
Compare providers for flights from Portland to Seattle
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Seattle in September.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy1 star | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Portland-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-Seattle flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Portland-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Portland to Seattle
Have a flexible travel schedule? Discover the best time to fly to Seattle from Portland with our price prediction graph.
PDX-SEA
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Portland to Seattle
Prices
Airlines
How far ahead should I book a flight from Portland to Seattle?
The price you pay for your flight from Portland to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 43 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.
What is the cheapest month to book a flight from Portland to Seattle?
Currently, January is the cheapest month in which you can book a flight from Portland to Seattle (average of $139). Flying from Portland to Seattle in March is currently the most expensive (average of $322). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from PDX to SEA?
Find hourly flight availability from Portland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 5, 2026.
When flying from Portland to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the morning, which can drop the price by up to 20% versus a flight at noon.
What is the cheapest day to fly from Portland to Seattle?
Use this chart to determine the cheapest time to fly round-trip from Portland to Seattle. Price data was last updated on August 29, 2026.
Travelers seeking maximum savings on their Portland to Seattle flight should consider departing on Thursday mornings when fares are most often at their lowest. Friday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
The best insider tips for Portland to Seattle flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Portland to Seattle trip
Our travel experts
Reviews of airlines servicing Seattle
Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated September 5, 2026.
Read reviews from past customers who have flown Alaska Airlines and Delta from Portland to Seattle. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Crew
8.5
Boarding
8.1
Comfort
7.8
Food
7.0
Entertainment
7.0
Overall
7.9
Reviews
1 / 20
8.0
ExcellentAnonymous,Jun 2026
RDU - SEA
Related info for your journey
Find useful and relevant information for your journey from Portland to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
Olympia
Tukwila
Edmonds
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ellensburg
Issaquah
Marysville
Ocean Shores
Lakewood
Fife
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Portland and Seattle flights
Browse other Portland and Seattle flight options. Last updated on September 5, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on September 5, 2026.
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Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on September 5, 2026.
Top 3 airlines flying from Portland to Seattle
Discover the top 3 airlines that operate flights from Portland to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated September 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$79 | Average$208 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$99 | Average$251 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$258 | Average$528 | FlexibilityNo cancel fee | On-timeN/A |