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$119+ Cheap flights from Seattle to Boston (SEA - BOS)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BOS
Apr 16 — Apr 231
Wed 4/16
Wed 4/23
1 adult, Economy
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Find cheap flights from Seattle to Boston 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

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3. Compare prices and book

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Boston Logan Intl are usually found in January or March, booked 87 days in advance, depart on a Friday or Wednesday and return on a Thursday

Cheap flight deals from Seattle to Boston

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Boston (BOS). 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 April 11, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$215
(Kiwi.com)

One-way from

$119
(JetBlue)

Popular in

July

Cheapest in

January

Average price

$348

Good round-trip deal

$264 or less

Good one-way deal

$146 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Boston Logan Intl flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Boston Logan Intl flights.
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From Seattle/Tacoma Intl to Boston Logan Intl
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One-way flight from Seattle/Tacoma Intl to Boston Logan Intl
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Highest demand for flights based on searches. 27% potential increase in price ($142 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($16 potential savings vs. average RT price).
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Average for round-trip flights in April 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Boston Logan Intl.
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Find flight deals from Seattle to Boston

Cheapest flights from Seattle to Boston
Explore the most affordable flight options available from Seattle to Boston. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 11, 2025.

This Kiwi.com deal was found by Cheapflights users on 4/10. 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.
Mon 5/1911:00 pmSEA - BOS
Nonstop5h 20mHawaiian Airlines
Wed 5/286:52 pmBOS - SEA
Nonstop6h 08mHawaiian Airlines
Deal found 4/10$215
This Delta deal was found by Cheapflights users on 4/11. 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.
Mon 5/1910:11 pmSEA - BOS
Nonstop5h 29mDelta
Wed 5/287:07 pmBOS - SEA
Nonstop6h 14mDelta
Deal found 4/11$217
This JetBlue Airways deal was found by Cheapflights users on 4/10. 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 JetBlue Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/2910:40 pmSEA - BOS
1 stop7h 34mJetBlue
Tue 6/37:10 amBOS - SEA
Nonstop6h 18mJetBlue
Deal found 4/10$227
This Expedia deal was found by Cheapflights users on 4/9. 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.
Wed 5/76:00 amSEA - BOS
2 stops23h 41mMultiple Airlines
Wed 5/147:00 amBOS - SEA
Nonstop6h 13mMultiple Airlines
Deal found 4/9$228
This Alaska Airlines deal was found by Cheapflights users on 4/11. 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 5/196:59 pmSEA - BOS
1 stop9h 41mAlaska Airlines
Wed 5/287:30 amBOS - SEA
Nonstop6h 10mAlaska Airlines
Deal found 4/11$237
This Southwest deal was found by Cheapflights users on 4/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/305:00 amSEA - BOS
1 stop8h 50mSouthwest
Sat 5/35:15 pmBOS - SEA
1 stop8h 30mSouthwest
Deal found 4/10$252
This FlightHub deal was found by Cheapflights users on 4/10. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/76:00 amSEA - BOS
2 stops23h 41mSpirit Airlines
Mon 5/127:47 pmBOS - SEA
2 stops21h 38mSpirit Airlines
Deal found 4/10$254
This American Airlines deal was found by Cheapflights users on 4/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2211:59 pmSEA - BOS
1 stop8h 31mAmerican Airlines
Wed 4/305:00 amBOS - SEA
1 stop8h 15mAmerican Airlines
Deal found 4/10$277
This United Airlines deal was found by Cheapflights users on 4/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/22:15 pmSEA - BOS
1 stop7h 30mUnited Airlines
Mon 5/53:25 pmBOS - SEA
1 stop10h 38mUnited Airlines
Deal found 4/10$283
This Booking.com deal was found by Cheapflights users on 4/11. 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.
Fri 10/36:04 pmSEA - BOS
1 stop13h 37mSun Country Air
Fri 10/1011:45 amBOS - SEA
1 stop8h 34mSun Country Air
Deal found 4/11$370

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Boston 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 2,558,603 searches. Data last updated April 11, 2025.
Use the filters below to find and compare flights from Seattle to Boston that are best for you.

Fly from

Seattle

Fly to

Boston

Route

Depart

Return

Price

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/19

11:00 pm-7:20 am

Nonstop5h 20m

Boston Logan Intl

Wed 5/28

6:52 pm-10:00 pm

Nonstop6h 08m

$215

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/19

10:11 pm-6:40 am

Nonstop5h 29m

Boston Logan Intl

Wed 5/28

7:07 pm-10:21 pm

Nonstop6h 14m

$217

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Thu 5/29

10:40 pm-9:14 am

1 stop7h 34m

Boston Logan Intl

Tue 6/3

7:10 am-10:28 am

Nonstop6h 18m

$227

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/7

6:00 am-8:41 am

2 stops23h 41m

Boston Logan Intl

Wed 5/14

7:00 am-10:13 am

Nonstop6h 13m

$228

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Mon 5/19

6:59 pm-7:40 am

1 stop9h 41m

Boston Logan Intl

Wed 5/28

7:30 am-10:40 am

Nonstop6h 10m

$237

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 4/30

5:00 am-4:50 pm

1 stop8h 50m

Boston Logan Intl

Sat 5/3

5:15 pm-10:45 pm

1 stop8h 30m

$252

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Wed 5/7

6:00 am-8:41 am

2 stops23h 41m

Boston Logan Intl

Mon 5/12

7:47 pm-2:25 pm

2 stops21h 38m

$254

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Tue 4/22

1:35 pm-11:59 pm

1 stop7h 24m

Boston Logan Intl

Tue 5/6

6:09 pm-12:45 am

1 stop9h 36m

$277

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 5/2

2:15 pm-12:45 am

1 stop7h 30m

Boston Logan Intl

Mon 5/5

3:25 pm-11:03 pm

1 stop10h 38m

$283

SeattleBoston

SEA - BOS

SEABOS

Seattle/Tacoma Intl

Fri 10/3

6:04 pm-10:41 am

1 stop13h 37m

Boston Logan Intl

Fri 10/10

11:45 am-5:19 pm

1 stop8h 34m

$370

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/10

Showing 1-10 of 20 results
1
2

Compare providers for flights from Seattle to Boston

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 Seattle to Boston in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
JustAirTicketPrice Accuracy-Trust Score*3 stars
FareScanPrice Accuracy-Trust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*2 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Boston flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Boston flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Boston flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Boston 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 Seattle-Boston flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Seattle to Boston flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Seattle to Boston trip
Airports
SEA

Use SEA Spot Saver for free security screening appointments, reducing wait times without TSA PreCheck or CLEAR.

Read more about SEAby Brandon Schultz
BOS

Take the MBTA Silver Line for a free ride from BOS to downtown Boston's South Station.

Read more about BOSby Paul Rubio
Our travel experts
Paul Rubio

Paul Rubio

Expert on BOS

Paul Rubio

Paul Rubio

Travel journalist and photographer Paul Rubio is a Miami native (and current resident), who has lived in nine countries and traveled to 137. He is an expert in luxury travel, eco-travel, loyalty programs, hotels, airports and airlines. He is a contributing editor at AFAR, Condé Nast Traveler, LUXURY Magazine, and Palm Beach Illustrated.

Read more
Brandon Schultz

Brandon Schultz

Expert on SEA

Brandon Schultz

Brandon Schultz

Brandon Schultz is an award-winning food and travel writer based in New York City. His work has appeared in Forbes, AAA, Thrillist, Travel + Leisure, and The Daily Meal, among many others, and he is the author of 6 books, including 3 cookbooks.

Read more

Best time to book a flight from Seattle to Boston

Have a flexible travel schedule? Discover the best time to fly to Boston from Seattle with our price prediction graph.
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 Seattle to Boston

How far ahead should I book a flight from Seattle to Boston?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Boston. Price data was last updated on April 4, 2025.

Booking 80 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Boston. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

What is the cheapest month to book a flight from Seattle to Boston?

Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of $218). Flying from Seattle to Boston in July is currently the most expensive (average of $311). 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 SEA to BOS?

Find hourly flight availability from Seattle to Boston. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated April 11, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 25% on flights from Seattle to Boston by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Seattle to Boston?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Boston. Price data was last updated on March 30, 2025.

Travelers seeking maximum savings on their Seattle to Boston flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Weekly flight availability from Seattle to Boston

Explore weekly flight availability from Seattle to Boston. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated April 11, 2025.

The most flights from SEA to BOS are scheduled on a Wednesday (31 on average). You will have fewer flight options on Tuesday, which is when the least amount of flights are scheduled (14 on average).

Rainfall in Boston by month

Plan your trip to Boston by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Boston ranges from 3.1 - 4.0 inches per month. March is typically the wettest month, when rainfall can reach 4.0 in. July is typically the driest time to visit Boston when rainfall is around 3.1 in.

Temperature in Boston by month

Plan your trip to Boston by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Boston, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Boston

Get insights into the airlines that provide service to Boston. 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 Boston. Reviews last updated April 11, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Seattle to Boston. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Alaska Airlines
8.0
Very good
9,851 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Southwest
8.0
Very good
4,279 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Delta
8.0
Very good
7,911 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
Hawaiian Airlines
7.9
Good
2,365 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies
United Airlines
7.4
Good
8,636 reviews
Alaska Airlines
8.0
Very good
9,851 reviews

Food

7.1

Overall

8.0

Comfort

7.9

Boarding

8.2

Crew

8.5

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

David,Aug 2024

SFO - BOS

Could not watch a movie, asked for help. Could not get extra cookies

Related info for your journey

Find useful and relevant information for your journey from Seattle to Boston. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airports do I use to fly from Seattle to Boston?

    Booking a flight from Seattle/Tacoma Intl (SEA) to Boston Logan Intl (BOS) is your only option if you wish to fly from Seattle to Boston. On a typical day, there are 24 flights from Seattle/Tacoma Intl to Logan Intl, all of which are around 5h 17m for a nonstop flight. You can also purchase a plane ticket from 10 airlines when you book a flight from Seattle/Tacoma Intl to Boston.

  • How popular is this Seattle to Boston flight route?

    Within the past month, 16 users have taken a look at flights from Seattle/Tacoma Intl to Boston Logan Intl.

  • What are the cheapest airlines flying from Seattle to Boston round-trip?

    Our cheapest airline available from Seattle to Boston is Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $215 on this airline. Additional options worth looking into are Delta and JetBlue, starting at $220 and $227 round-trip. Hawaiian Airlines is currently priced 42% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Seattle to Boston one-way?

    For one-way options, check prices for JetBlue. According to our data, you can fly for as low as $119. Users have also found prices from $124 and $129 on Hawaiian Airlines and American Airlines, respectively.

  • What are the most reliable airlines from Seattle to Boston?

    Before booking your flight to Boston from Seattle, check out the most reliable airlines to get you to your destination on time: KLM (100%), LATAM Airlines (100%), Condor( 92%).

  • What are the cheapest flights from Seattle to Boston?

    Looking at all options, your cheapest flight can be booked for $118. While the most popular route (Seattle/Tacoma Intl - Boston Logan Intl) can be booked for $212 on average our data indicates $789 when flying from Seattle to Boston.

  • Can I find deals for flights from Seattle to Boston that include hotel bookings?

    Yes. In addition to deals on Seattle to Boston flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Boston?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Boston.

  • Can I find deals for business class flights from Seattle to Boston?

    Yes. Cheapflights offers flight deals from Seattle to Boston by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Boston?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Boston (average of $218). Flying from Seattle to Boston in July is currently the most expensive (average of $311). 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.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Marlborough
Warwick
Waltham
Cambridge
Framingham
Chestnut Hill
Seekonk
Randolph
Brockton
Lowell
West Yarmouth
Woburn
Somerville
Saco
Seabrook
Burlington
Smithfield
Salem
Chelsea
Brookline

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Alternative routes for Seattle to Boston

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Seattle to Boston

Discover the top 9 airlines that operate flights from Seattle to Boston. 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 2,558,603 searches. Data last updated April 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$108Average$457FlexibilityNo cancel feeOn-time85%
JetBlueCheapest$141Average$391FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$145Average$260FlexibilityNo cancel feeOn-time65%
Sun Country AirCheapest$176Average$382FlexibilityNo cancel feeOn-time83%
DeltaCheapest$185Average$410FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$228Average$487FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$237Average$405FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$238Average$406FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$356Average$466FlexibilityNo cancel feeOn-time63%

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