Reagan-National

$130+ Cheap flights from Seattle (SEA) to Reagan-National (DCA)

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 2/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — DCA
Jan 11 — Jan 181
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Find cheap flights from Seattle to Reagan-National 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”

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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Washington, D.C. Reagan-National are usually found in September or October, booked 59 days in advance, depart on a Friday or Thursday and return on a Tuesday

Cheap flight deals from Seattle to Reagan-National

Cheapest flights from Seattle to Reagan-National
Explore the most affordable flight options available from Seattle to Reagan-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 12, 2025.

This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:25 pmSEA - DCA
1 stop24h 34mFrontier
Wed 1/78:59 amDCA - SEA
1 stop29h 22mFrontier
Deal found 12/11$254
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/1412:48 pmSEA - DCA
1 stop21h 18mFrontier
Sat 1/106:00 pmDCA - SEA
1 stop20h 21mFrontier
Deal found 12/11$283
This Booking.com deal was found by Cheapflights users on 12/9. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/302:54 pmSEA - DCA
1 stop28h 05mFrontier
Sun 1/46:00 pmDCA - SEA
1 stop21h 30mFrontier
Deal found 12/9$293
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:25 pmSEA - DCA
1 stop20h 36mFrontier
Thu 1/12:00 pmDCA - SEA
1 stop25h 30mFrontier
Deal found 12/11$325
This Delta deal was found by Cheapflights users on 12/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:35 amSEA - DCA
Nonstop5h 01mDelta
Mon 1/54:44 pmDCA - SEA
Nonstop5h 59mDelta
Deal found 12/10$367
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/181:25 pmSEA - DCA
1 stop29h 34mFrontier
Thu 1/12:00 pmDCA - SEA
1 stop25h 30mFrontier
Deal found 12/11$384
This Southwest deal was found by Cheapflights users on 12/10. 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.
Thu 12/259:35 amSEA - DCA
2 stops10h 15mSouthwest
Thu 1/84:05 pmDCA - SEA
1 stop9h 30mSouthwest
Deal found 12/10$398
This United Airlines deal was found by Cheapflights users on 12/10. 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.
Wed 12/3111:09 pmSEA - DCA
1 stop10h 15mUnited Airlines
Mon 1/56:00 pmDCA - SEA
1 stop7h 47mUnited Airlines
Deal found 12/10$402
This Travelocity deal was found by Cheapflights users on 12/11. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/251:55 pmSEA - DCA
Nonstop5h 04mAlaska Airlines
Wed 1/78:59 amDCA - SEA
1 stop11h 30mAlaska Airlines
Deal found 12/11$403
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/153:40 pmSEA - DCA
1 stop18h 26mFrontier
Sun 1/46:00 pmDCA - SEA
1 stop21h 30mFrontier
Deal found 12/11$413
This CheapOair deal was found by Cheapflights users on 12/11. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1112:48 pmSEA - DCA
1 stop21h 18mFrontier
Sun 1/42:00 pmDCA - SEA
1 stop25h 30mFrontier
Deal found 12/11$414

Find flight deals from Seattle to Reagan-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Reagan-National (DCA). 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 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$218
(CheapOair)

One-way from

$130
(Delta)

Popular in

March

Cheapest in

September

Average price

$397

Good round-trip deal

$283 or less

Good one-way deal

$248 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Washington, D.C. Reagan-National flight deals.
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Washington, D.C. Reagan-National flights.
From Seattle/Tacoma Intl to Washington, D.C. Reagan-National
One-way flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National
Highest demand for flights based on searches. 5% potential increase in price ($23 potential increase over avg. RT price).
Cheapest flight prices on average. 0% potential price decrease ($5 potential savings vs. average RT price).
Average for round-trip flights in December 2025
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.
Price to beat on a one-way flight from Seattle/Tacoma Intl to Washington, D.C. Reagan-National.

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Reagan-National 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 12, 2025.
Use the filters below to find and compare flights from Seattle to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Seattle

Fly to

Reagan-National

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 1/9

7:20 am-3:20 pm

Nonstop5h 00m

Washington, D.C. Reagan-National

Sun 1/11

4:44 pm-7:43 pm

Nonstop5h 59m

$248

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 3/11

7:25 am-3:22 pm

Nonstop4h 57m

Washington, D.C. Reagan-National

Sat 3/14

4:45 pm-7:37 pm

Nonstop5h 52m

$248

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 2/19

7:20 am-3:20 pm

Nonstop5h 00m

Washington, D.C. Reagan-National

Sun 2/22

4:44 pm-7:43 pm

Nonstop5h 59m

$248

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sun 1/11

11:10 pm-8:53 am

1 stop6h 43m

Washington, D.C. Reagan-National

Thu 1/15

4:44 pm-7:43 pm

Nonstop5h 59m

$249

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Mon 1/5

7:20 am-3:20 pm

Nonstop5h 00m

Washington, D.C. Reagan-National

Mon 1/12

5:10 pm-11:22 pm

1 stop9h 12m

$258

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 1/14

6:05 am-6:04 pm

1 stop8h 59m

Washington, D.C. Reagan-National

Thu 1/15

6:05 am-10:55 am

1 stop7h 50m

$259

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Wed 1/14

7:20 am-3:20 pm

Nonstop5h 00m

Washington, D.C. Reagan-National

Fri 1/16

4:44 pm-7:43 pm

Nonstop5h 59m

$268

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Tue 1/13

7:20 am-3:20 pm

Nonstop5h 00m

Washington, D.C. Reagan-National

Fri 1/16

4:44 pm-7:43 pm

Nonstop5h 59m

$268

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Thu 1/15

5:25 am-4:00 pm

1 stop7h 35m

Washington, D.C. Reagan-National

Sat 1/17

7:35 am-2:45 pm

1 stop10h 10m

$268

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sun 2/8

11:10 pm-12:00 pm

1 stop9h 50m

$130

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 20 results
1
2

Compare providers for flights from Seattle to Reagan-National

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 Reagan-National in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
CheapOairPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars
Kiwi.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust Score*1 star
CheapTicketsDealPrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice 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-Washington, D.C. Reagan-National Airport flights, users find the pricing of CheapOair to be most consistent on Cheapflights vs. CheapOair Users can find the same prices on Seattle-Washington, D.C. Reagan-National Airport flight deals on Cheapflights vs. CheapOair >95% of the time. Price accuracy is based on data collected from Seattle-Washington, D.C. Reagan-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Washington, D.C. Reagan-National Airport flights, Cheapflights users trust CheapOair the most. CheapOair 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-Washington, D.C. Reagan-National Airport 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 Seattle to Reagan-National

Have a flexible travel schedule? Discover the best time to fly to Reagan-National 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 Washington, D.C. Reagan-National Airport

How far ahead should I book a flight from Seattle to Washington, D.C. Reagan-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Reagan-National. Price data was last updated on December 5, 2025.

The price you pay for your flight from Seattle to Washington, D.C. Reagan-National Airport may vary depending on when you book. For the best chance of a lower fare, look to book 59 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 Seattle to Washington, D.C. Reagan-National Airport?

Currently, July is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $149). Flying from Seattle to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $287). 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 DCA?

Find hourly flight availability from Seattle to Reagan-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 12, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 30% on flights from Seattle to Washington, D.C. Reagan-National Airport by exploring options for tickets in the afternoon.

What is the cheapest day to fly from Seattle to Washington, D.C. Reagan-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Reagan-National. Price data was last updated on December 6, 2025.

Travelers seeking maximum savings on their Seattle to Washington, D.C. Reagan-National Airport flight should consider departing on Thursday afternoons 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.

The best insider tips for Seattle to Washington, D.C. Reagan-National Airport 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 Seattle to Washington, D.C. Reagan-National Airport trip
Airports
SEA

Plan to arrive at SEA at least two hours before your flight. Use SEA Spot Saver for a quicker security experience.

DCA

DCA is easily accessible by Metro, offering a clean and affordable way to reach downtown D.C. and nearby areas.

Our travel experts
Emily Zemler

Emily Zemler

Expert on DCA

Emily Zemler

Emily Zemler

Emily is a freelance writer and book author based in London covering entertainment and travel. Her work has appeared in Los Angeles Times, Observer, and Conde Nast Traveler She has ventured to more than 40 countries and all seven continents, always in search of a great art museum. She has written extensively about hotels, luxury travel, and aviation.

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

Reviews of airlines servicing Reagan-National

Get insights into the airlines that provide service to Reagan-National. 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 Reagan-National. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown Alaska Airlines, Delta, and United Airlines from Seattle to Washington, D.C. Reagan-National Airport. 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.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Comfort

7.8

Crew

8.5

Overall

8.0

Entertainment

7.0

Food

7.1

Boarding

8.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Sep 2025

SEA - MKE

The crew were excellent, flight good, but the actual space for a person to occupy for 4 hours seems to get smaller and smaller 🤣. I am not overweight, and average height….very uncomfortable,, especially when I couldn’t recliner the seat at all, and the pocket in front doesn’t accommodate a water bottle.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Reagan-National. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Seattle to Washington, D.C. Reagan-National?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Washington, D.C. Reagan-National. 7 airlines have flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National on a regular basis. Booking flights from Seattle/Tacoma Intl to Washington, D.C. Reagan-National should not be difficult; the airport handles an average of 9 outbound flights to Washington, D.C. Reagan-National per day.

  • How long is the flight from Seattle to Washington, D.C. Reagan-National Airport?

    There are many flights that can get you from Seattle to Washington, D.C. Reagan-National Airport in 5h. Fly via Delta to get the fastest option. Seattle and Washington, D.C. Reagan-National Airport are separated by a distance of 2321 mi. Generally, flights for this route are nonstop.

  • What are the cheapest airlines flying from Seattle to Washington, D.C. Reagan-National Airport round-trip?

    Our cheapest airline available from Seattle to Washington, D.C. Reagan-National Airport is Hawaiian Airlines. Our recent data shows that you can find tickets from as low as $143 on this airline. Additional options worth looking into are Frontier and Delta, starting at $149 and $180 round-trip. Hawaiian Airlines is 66% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from Seattle to Washington, D.C. Reagan-National Airport one-way?

    The cheapest airlines for a one-way flight from Seattle to Washington, D.C. Reagan-National Airport are Frontier ($116), Hawaiian Airlines ($138), and Delta ($143).

  • What are the most reliable airlines from Seattle to Washington, D.C. Reagan-National Airport?

    No one likes to see their flight delayed. When booking a flight from Seattle to Washington, D.C. Reagan-National Airport consider choosing Delta (92%), Alaska Airlines (80%) or Hawaiian Airlines (80%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from Seattle to Washington, D.C. Reagan-National Airport?

    Looking for the cheapest flight from Seattle to Washington, D.C. Reagan-National Airport? While on average our users pay $468, our data indicates the cheapest price to be $119. The most popular route (Seattle/Tacoma Intl - Washington, D.C. Reagan-National), is priced around $167.

  • Can I find deals for flights from Seattle to Reagan-National that include hotel bookings?

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

  • How can I find direct flights from Seattle to Reagan-National?

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

  • Can I find deals for business class flights from Seattle to Reagan-National?

    Yes. Cheapflights offers flight deals from Seattle to Reagan-National 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 Washington, D.C. Reagan-National Airport?

    Currently, July is the cheapest month in which you can book a flight from Seattle to Washington, D.C. Reagan-National Airport (average of $149). Flying from Seattle to Washington, D.C. Reagan-National Airport in March is currently the most expensive (average of $287). 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 Washington, D.C. Reagan-National Airport?

Book flights to Washington, D.C. Reagan-National Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Fairfax
Linthicum Heights
Manassas
Rockville
Laurel
Towson
National Harbor
Bowie
Largo
McLean
Clinton

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Top 7 airlines flying from Seattle to Reagan-National

Discover the top 7 airlines that operate flights from Seattle to Reagan-National. 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
Hawaiian AirlinesCheapest$143Average$458FlexibilityNo cancel feeOn-time85%
FrontierCheapest$156Average$294FlexibilityNo cancel feeOn-time62%
DeltaCheapest$220Average$434FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$243Average$442FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$276Average$456FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$281Average$521FlexibilityNo cancel feeOn-time75%
SouthwestCheapest$296Average$456FlexibilityNo cancel feeOn-time63%

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