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$109+ Cheap flights from Boston to Seattle (BOS - SEA)

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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOS — SEA
Dec 28 — Jan 42
Sat 12/28
Sat 1/4
2 travelers, Economy
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The best prices from Boston Logan Intl to Seattle/Tacoma Intl are usually found in January or February, booked 82 days in advance, depart on a Friday or Thursday and return on a Wednesday

Cheap flight deals from Boston to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Boston (BOS) 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 December 23, 2024.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$197
(JetBlue)

One-way from

$109
(American Airlines)

Popular in

July

Cheapest in

January

Average price

$386
Provider with most accurate pricing for Boston Logan Intl-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Boston Logan Intl-Seattle/Tacoma Intl flights.
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From Boston Logan Intl to Seattle/Tacoma Intl
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One-way flight from Boston Logan Intl to Seattle/Tacoma Intl
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High demand for flights, 28% potential price rise
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Best time to find cheap flights, 4% potential price drop
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Average for round-trip flights in December 2024
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Find flight deals from Boston to Seattle

Cheapest flights from Boston to Seattle
Explore the most affordable flight options available from Boston to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 23, 2024.

This Delta deal was found by Cheapflights users on 12/23. 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 12/257:40 amBOS - SEA
1 stop8h 25mDelta
Wed 1/87:30 amSEA - BOS
Nonstop5h 29mDelta
Deal found 12/23$367
This American Airlines deal was found by Cheapflights users on 12/23. 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.
Thu 12/265:38 amBOS - SEA
1 stop10h 45mAmerican Airlines
Thu 1/21:35 pmSEA - BOS
1 stop7h 40mAmerican Airlines
Deal found 12/23$426
This Alaska Airlines deal was found by Cheapflights users on 12/23. 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 12/266:59 pmBOS - SEA
1 stop16h 19mAlaska Airlines
Thu 1/29:10 pmSEA - BOS
Nonstop5h 20mAlaska Airlines
Deal found 12/23$456
This JetBlue Airways deal was found by Cheapflights users on 12/23. 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.
Wed 12/259:16 amBOS - SEA
Nonstop6h 22mJetBlue
Wed 1/83:20 pmSEA - BOS
Nonstop5h 10mJetBlue
Deal found 12/23$457
This Southwest deal was found by Cheapflights users on 12/23. 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 12/258:00 amBOS - SEA
2 stops13h 40mSouthwest
Sat 12/281:50 pmSEA - BOS
1 stop8h 25mSouthwest
Deal found 12/23$511
This United Airlines deal was found by Cheapflights users on 12/23. 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.
Mon 12/306:00 amBOS - SEA
1 stop11h 15mUnited Airlines
Mon 1/67:15 amSEA - BOS
1 stop11h 57mUnited Airlines
Deal found 12/23$558
This Travelocity deal was found by Cheapflights users on 12/23. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/3011:46 amBOS - SEA
1 stop13h 57mMultiple Airlines
Mon 1/63:45 pmSEA - BOS
Nonstop5h 14mMultiple Airlines
Deal found 12/23$580
This FlightHub deal was found by Cheapflights users on 12/23. 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.
Mon 12/3011:46 amBOS - SEA
1 stop8h 29mSun Country Air
Sat 1/46:34 pmSEA - BOS
1 stop13h 17mSun Country Air
Deal found 12/23$635
This Mytrip deal was found by Cheapflights users on 12/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/269:46 pmBOS - SEA
2 stops27h 37mSpirit Airlines
Thu 1/26:11 amSEA - BOS
3 stops35h 48mSpirit Airlines
Deal found 12/22$848

Find flights from Boston to Seattle within your budget

Customize your flight search to find flights from Boston 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 2,558,603 searches. Data last updated December 23, 2024.

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Depart

Return

Price

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 1/27

5:55 pm-9:34 pm

Nonstop6h 39m

Seattle/Tacoma Intl

Tue 2/4

7:55 am-4:24 pm

Nonstop5h 29m

$186

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 1/24

10:45 am-2:10 pm

Nonstop6h 25m

Seattle/Tacoma Intl

Wed 1/29

3:20 pm-11:30 pm

Nonstop5h 10m

$197

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 1/8

5:55 pm-9:34 pm

Nonstop6h 39m

Seattle/Tacoma Intl

Tue 1/14

9:45 am-9:28 am

2 stops20h 43m

$204

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Mon 1/27

10:30 am-7:00 pm

1 stop11h 30m

Seattle/Tacoma Intl

Tue 2/4

7:11 am-8:52 pm

1 stop10h 41m

$218

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 1/8

10:03 pm-12:19 am

2 stops29h 16m

Seattle/Tacoma Intl

Tue 1/14

9:45 am-9:28 am

2 stops20h 43m

$220

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Fri 1/10

7:05 pm-10:25 pm

Nonstop6h 20m

Seattle/Tacoma Intl

Fri 1/17

7:30 am-3:59 pm

Nonstop5h 29m

$227

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Sat 1/18

11:00 am-7:08 pm

1 stop11h 08m

Seattle/Tacoma Intl

Sat 1/25

5:00 am-5:23 pm

2 stops9h 23m

$241

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 1/7

2:05 pm-11:20 pm

2 stops12h 15m

Seattle/Tacoma Intl

Fri 1/10

10:40 am-9:40 pm

1 stop8h 00m

$288

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Tue 2/4

5:20 am-2:56 pm

1 stop12h 36m

$109

BostonSeattle

BOS - SEA

BOSSEA

Boston Logan Intl

Wed 1/8

5:24 pm-9:30 am

1 stop19h 06m

$114

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/22

Showing 1-10 of 17 results
1
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Compare providers for flights from Boston 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 Boston to Seattle in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*1 star
CheapfaremartPrice Accuracy-Trust Score*1 star
PricelinePrice Accuracy2 starsTrust Score*3 stars
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
oojoPrice 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 Boston-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Boston-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Boston-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Boston-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 Boston-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Boston to Seattle flights

Find out what our experts recommend to make the most of your Boston to Seattle trip
Airlines
Delta

Delta offers free Wi-Fi for SkyMiles members, enhancing productivity during the 6-hour flight.


Delta Comfort Plus provides extra legroom and early boarding, ideal for a more comfortable journey.

Read more about Deltaby Harriet Baskas
Alaska Airlines

Alaska Airlines' Premium Class offers extra legroom and free cocktails, enhancing comfort on longer flights.


Alaska Airlines provides flat-fee Wi-Fi, ideal for staying connected during the flight.

Read more about Alaska Airlinesby Robert Schrader
JetBlue

JetBlue's Even More Space seats offer up to 38 inches of legroom, enhancing comfort on long flights.


JetBlue provides free onboard Wi-Fi and seatback screens, ensuring entertainment throughout the flight.

Read more about JetBlueby Blane Bachelor
Airports
BOS

Use the FlyLogan App to pre-order meals and save time at BOS. Most restaurants participate, making it a convenient option for travelers.

Read more about BOSby Paul Rubio
SEA

Take the Link light rail from SEA to downtown Seattle. It's affordable, runs every 10 minutes, and takes less than 40 minutes.

Read more about SEAby Brandon Schultz
Our travel experts
Harriet Baskas

Harriet Baskas

Expert on Delta

Harriet Baskas

Harriet Baskas

Harriet is an award-winning journalist who is happiest in an airport or an unusual museum. Her stories about airports, air travel, and the business of travel have appeared on NBC News, CNBC, USA TODAY, The Points Guy and other outlets. She is the creator of the StuckatTheAirport.com blog and the author of nine books. When not out on the road or exploring the latest airport amenities, she’s home in Seattle getting ready for the next adventure.

Read more
Robert Schrader

Robert Schrader

Expert on Alaska Airlines

Robert Schrader

Robert Schrader

One of the web's original travel bloggers, Robert launched his first site Leave Your Daily Hell in 2009. Since then, he's expanded into destination niche sites (one each for Japan, Thailand and Taiwan), in addition to having written for the inflight magazines of Singapore Airlines and Korean Air. Overall, he's visited nearly 100 countries, and flies business as often as possible.

Read more
Blane Bachelor

Blane Bachelor

Expert on JetBlue

Blane Bachelor

Blane Bachelor

Blane Bachelor is a journalist and editor specializing in travel and aviation who writes regularly for top global outlets. Born and raised in Florida, Blane has worked and lived in four countries, including the Netherlands, where she’s currently based with her family. Her favorite way to get to know a new destination is by running or riding a bike around town – or hearing a spooky ghost story about local history. She will always choose the window seat.

Read more
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 travels every week and makes friends with stray cats wherever he goes. Dogs, too... he once brought one home to the US from the Amalfi Coast. He’s written 6 books, visited 6 continents (still waiting on Antarctica), and would eat ice cream 6 times a day if he could. He lives in Brooklyn, New York, with his partner and three cats.

Read more

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.

Best time to book a flight from Boston to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Boston 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.

Travel insights for flights from Boston to Seattle

Get recent, data-driven insights about flights from Boston to Seattle including ideal travel times, pricing trends, and more.

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

Use this chart to determine the optimal time to book a round-trip flight from Boston to Seattle. Price data was last updated on December 20, 2024.

The price you pay for your flight from Boston to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 82 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 Boston to Seattle?

Currently, January is the cheapest month in which you can book a flight from Boston to Seattle (average of $238). Flying from Boston to Seattle in July is currently the most expensive (average of $411). 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 BOS to SEA?

Find hourly flight availability from Boston 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 December 23, 2024.

One of the essential ways to save on airfare from Boston to Seattle is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the evening could potentially save you up to 31% on airfare.

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

Use this chart to determine the cheapest time to fly round-trip from Boston to Seattle. Price data was last updated on December 16, 2024.

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

Weekly flight availability from Boston to Seattle

Explore weekly flight availability from Boston to Seattle. 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 December 23, 2024.

The most flights from BOS to SEA are scheduled on a Monday (26 on average). You will have fewer flight options on Wednesday, which is when the least amount of flights are scheduled (10 on average).

Rainfall in Seattle by month

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

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

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

If weather is an important factor for your trip to Seattle, 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 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 December 23, 2024.
To help decide which airline to fly from Boston to Seattle, see what other customers have to say about American Airlines, United Airlines and Spirit Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Southwest
8.1
Very good
4,780 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Alaska Airlines
8.0
Very good
9,555 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Delta
8.0
Very good
8,588 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

JetBlue
7.4
Good
3,263 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

United Airlines
7.4
Good
9,022 reviews
Southwest
8.1
Very good
4,780 reviews

Entertainment

7.7

Boarding

8.2

Food

7.2

Crew

8.7

Overall

8.1

Comfort

8.1

Reviews

1 / 10

We BARELY made the connection and when we got onboard we were treated like disobedient children who should have arrived earlier because we had to ask other passengers to move so we could sit with our kids. The flight attendants on the first flight were nice but the second one, they were snippy and fairly rude.

Related info for your journey

Find useful and relevant information for your journey from Boston to Seattle. 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 Boston to Seattle?

    You will need to book a flight from Boston Logan Intl to Seattle/Tacoma Intl if you want to fly from Boston to Seattle. At least 9 different airlines have flights from Logan Intl (BOS) to Seattle/Tacoma Intl (SEA) on a regular basis. There are 19 flights to Seattle from the Boston airport per day. If you manage to book one that is nonstop, then you can expect the flight time from BOS to SEA to be around 6h 14m.

  • How popular is this Boston to Seattle flight route?

    Flights from Boston Logan Intl to Seattle/Tacoma Intl have been viewed 64 times in the past calendar month.

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

    According to our current data, JetBlue ($197), Alaska Airlines ($206), and American Airlines ($216) offers the cheapest pricing from Boston to Seattle. These flights start at 45% lower than the current average price 3 months from now.

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

    One-way options have recently been found by users for as low as $109 on American Airlines. Other airlines that offer cheap prices include Alaska Airlines from $114 and JetBlue from $119 one-way.

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

    Consider Hainan Airlines (100%), EL AL (97%) or China Eastern (94%) when booking your flight. These represent the most reliable airlines when flying from Boston to Seattle.

  • What are the cheapest flights from Boston to Seattle?

    On average you can expect to pay $1,012 for a flight from Boston to Seattle. The cheapest flight overall is $100 while the most popular route, (Boston Logan Intl - Seattle/Tacoma Intl) is currently priced at $189.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Boston to Seattle 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 Boston to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Boston to Seattle (average of $238). Flying from Boston to Seattle in July is currently the most expensive (average of $411). 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

Browse thousands of different options on Cheapflights for your next trip

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Top 8 airlines flying from Boston to Seattle

Discover the top 8 airlines that operate flights from Boston 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 2,558,603 searches. Data last updated December 23, 2024.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$133Average$392FlexibilityNo cancel feeOn-time62%
DeltaCheapest$168Average$407FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$176Average$373FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$186Average$445FlexibilityNo cancel feeOn-time75%
Spirit AirlinesCheapest$187Average$286FlexibilityNo cancel feeOn-time65%
American AirlinesCheapest$204Average$449FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$236Average$428FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$396Average$531FlexibilityNo cancel feeOn-time63%
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