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Heathrow

$371+ Cheap flights from Portland (PDX) to Heathrow (LHR)

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 5/14. Fares are subject to change and may not be available on all flights or dates of travel.
PDX — LHR
Mar 26 — Apr 21
Wed 3/26
Wed 4/2
1 adult, Economy
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1. Tell us where you want to go
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Cheapflights Tip: The best prices from Portland to London Heathrow are usually found in April or October, booked 65 days in advance, depart on a Tuesday or Wednesday and return on a Friday

Cheap flight deals from Portland to Heathrow

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Heathrow (LHR). 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 March 21, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$604
(Gotogate)

One-way from

$371
(Kiwi.com)

Popular in

June

Cheapest in

April

Average price

$751

Good round-trip deal

$729 or less

Good one-way deal

$538 or less
Provider with most accurate pricing for Portland-London Heathrow flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-London Heathrow flights.
Search Deals
From Portland to London Heathrow
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One-way flight from Portland to London Heathrow
Search Deals
Highest demand for flights based on searches. 22% potential increase in price ($249 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($41 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals
Price to beat on a round-trip flight from Portland to London Heathrow.
Search Deals
Price to beat on a one-way flight from Portland to London Heathrow.
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Find flight deals from Portland to Heathrow

Cheapest flights from Portland to Heathrow
Explore the most affordable flight options available from Portland to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 21, 2025.

This Gotogate deal was found by Cheapflights users on 3/21. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/83:20 pmPDX - LHR
1 stop12h 35mIcelandair
Thu 5/151:05 pmLHR - PDX
1 stop12h 50mIcelandair
Deal found 3/21$604
This Expedia deal was found by Cheapflights users on 3/21. 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.
Sun 4/611:57 amPDX - LHR
1 stop14h 53mIberia
Tue 4/223:40 pmLHR - PDX
Nonstop9h 55mIberia
Deal found 3/21$605
This EaseMyTrip deal was found by Cheapflights users on 3/21. 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 EaseMyTrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/2010:10 amPDX - LHR
2 stops17h 40mAir Canada
Wed 4/302:10 pmLHR - PDX
1 stop16h 45mAir Canada
Deal found 3/21$608
This Mytrip deal was found by Cheapflights users on 3/21. 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.
Sun 4/277:05 pmPDX - LHR
1 stop34h 15mMultiple Airlines
Wed 5/78:05 pmLHR - PDX
2 stops30h 40mMultiple Airlines
Deal found 3/21$617
This Finnair deal was found by Cheapflights users on 3/21. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/67:25 pmPDX - LHR
Nonstop9h 35mFinnair
Tue 4/223:40 pmLHR - PDX
Nonstop9h 55mFinnair
Deal found 3/21$627
This Gotogate deal was found by Cheapflights users on 3/19. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/193:25 pmPDX - LHR
2 stops36h 25mLufthansa
Tue 5/69:30 amLHR - PDX
2 stops45h 25mLufthansa
Deal found 3/19$629
This United deal was found by Cheapflights users on 3/21. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/187:30 pmPDX - LHR
1 stop30h 55mUnited Airlines
Wed 10/291:00 pmLHR - PDX
1 stop27h 34mUnited Airlines
Deal found 3/21$632
This Virgin Atlantic deal was found by Cheapflights users on 3/20. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/67:05 amPDX - LHR
1 stop16h 10mVirgin Atlantic
Tue 4/228:55 pmLHR - PDX
1 stop22h 25mVirgin Atlantic
Deal found 3/20$636
This oojo deal was found by Cheapflights users on 3/21. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/62:21 pmPDX - LHR
1 stop14h 09mBritish Airways
Mon 10/138:00 pmLHR - PDX
2 stops34h 52mBritish Airways
Deal found 3/21$642
This Delta deal was found by Cheapflights users on 3/20. 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.
Sun 4/65:10 pmPDX - LHR
1 stop13h 05mDelta
Tue 4/226:15 amLHR - PDX
2 stops19h 51mDelta
Deal found 3/20$645
This American Airlines deal was found by Cheapflights users on 3/21. 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.
Sun 4/611:57 amPDX - LHR
2 stops16h 43mAmerican Airlines
Tue 4/2212:15 pmLHR - PDX
2 stops18h 32mAmerican Airlines
Deal found 3/21$648
This KLM deal was found by Cheapflights users on 3/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/211:35 pmPDX - LHR
1 stop12h 15mKLM
Mon 4/286:30 amLHR - PDX
1 stop12h 50mKLM
Deal found 3/20$687

Cheapflights Fare Finder

Customize your flight search to find flights from Portland to Heathrow 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 March 21, 2025.
Use the filters below to find and compare flights from Portland to London Heathrow Airport that are best for you.

Fly from

Portland

Fly to

Heathrow

Route

Depart

Return

Price

PortlandLondon

PDX - LHR

PDXLHR

Portland

Thu 5/8

3:20 pm-11:55 am

1 stop12h 35m

London Heathrow

Thu 5/15

1:05 pm-5:55 pm

1 stop12h 50m

$604

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/6

11:57 am-10:50 am

1 stop14h 53m

London Heathrow

Tue 4/22

3:40 pm-5:35 pm

Nonstop9h 55m

$605

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/20

10:10 am-11:50 am

2 stops17h 40m

London Heathrow

Wed 4/30

2:10 pm-10:55 pm

1 stop16h 45m

$608

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/27

7:05 pm-1:20 pm

1 stop34h 15m

London Heathrow

Wed 5/7

8:05 pm-6:45 pm

2 stops30h 40m

$617

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/6

7:25 pm-1:00 pm

Nonstop9h 35m

London Heathrow

Tue 4/22

3:40 pm-5:35 pm

Nonstop9h 55m

$627

PortlandLondon

PDX - LHR

PDXLHR

Portland

Tue 4/15

10:10 am-11:50 am

2 stops17h 40m

London Heathrow

Tue 4/22

8:30 am-6:25 pm

2 stops41h 55m

$628

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/27

8:45 am-12:20 pm

1 stop19h 35m

London Heathrow

Tue 5/6

6:30 am-6:45 pm

2 stops20h 15m

$633

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/6

7:05 am-7:15 am

1 stop16h 10m

London Heathrow

Tue 4/22

8:55 pm-11:20 am

1 stop22h 25m

$636

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/6

5:10 pm-2:15 pm

1 stop13h 05m

London Heathrow

Tue 4/22

6:15 am-6:06 pm

2 stops19h 51m

$645

PortlandLondon

PDX - LHR

PDXLHR

Portland

Sun 4/6

11:57 am-12:40 pm

2 stops16h 43m

London Heathrow

Tue 4/22

12:15 pm-10:47 pm

2 stops18h 32m

$648

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/20

Showing 1-10 of 25 results
1
2
3

Compare providers for flights from Portland to Heathrow

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 Heathrow in March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
MytripPrice Accuracy3 starsTrust Score*3 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars
business-class.comPrice Accuracy3 starsTrust Score*3 stars
CheapfaremartPrice Accuracy-Trust 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 Portland-London Heathrow Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland-London Heathrow Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland-London Heathrow Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-London Heathrow Airport 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-London Heathrow Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

The best insider tips for Portland to London Heathrow Airport 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 Portland to London Heathrow Airport trip
Airports
PDX

Expect security wait times up to 15 minutes off-peak, longer during rush hours. Use Express Lanes if eligible for faster processing.

Read more about PDXby Brandon Schultz
LHR

Take the Heathrow Express to Paddington for the fastest route into central London. It's quicker than taxis or rideshares.

Read more about LHRby Ramsey Qubein
Our travel experts
Brandon Schultz

Brandon Schultz

Expert on PDX

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
Ramsey Qubein

Ramsey Qubein

Expert on LHR

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from Portland to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Portland 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 Portland to London Heathrow Airport

How far ahead should I book a flight from Portland to London Heathrow Airport?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Heathrow. Price data was last updated on March 14, 2025.

Booking 65 days in advance of your planned departure date is, on average, the best time to get cheap flights from Portland to London Heathrow Airport. 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 Portland to London Heathrow Airport?

Currently, November is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $661). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,122). 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 LHR?

Find hourly flight availability from Portland to Heathrow. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 21, 2025.

One of the essential ways to save on airfare from Portland to London Heathrow Airport is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at noon could potentially save you up to 21% on airfare.

What is the cheapest day to fly from Portland to London Heathrow Airport?

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

Travelers seeking maximum savings on their Portland to London Heathrow Airport flight should consider departing on Thursday afternoons when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Heathrow by month

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

In terms of precipitation, rainfall in London Heathrow Airport ranges from 1.6 - 2.8 inches per month. January is typically the wettest month, when rainfall can reach 2.8 in. July is typically the driest time to visit London Heathrow Airport when rainfall is around 1.6 in.

Temperature in Heathrow by month

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

If weather is an important factor for your trip to London Heathrow Airport, 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 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 39.2 F).

Reviews of airlines servicing Heathrow

Get insights into the airlines that provide service to Heathrow. 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 Heathrow. Reviews last updated March 21, 2025.
Read reviews from past customers who have flown Delta, Alaska Airlines and KLM from Portland to London. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,895 reviews
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Alaska Airlines
8.0
Very good
9,759 reviews
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,319 reviews
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Finnair
7.6
Good
1,266 reviews
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,567 reviews
Delta
8.0
Very good
7,895 reviews

Comfort

8.0

Overall

8.0

Food

7.3

Boarding

8.2

Crew

8.5

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

Find useful and relevant information for your journey from Portland to Heathrow. 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 Portland to London Heathrow?

    Most people fly from Portland (PDX) if they book a flight from Portland to London Heathrow. On average, Portland has 2 outbound flights to London Heathrow per day from 12 airlines. Portland is conveniently located just 6.0 mi from Portland’s city center.

  • What are the cheapest airlines flying from Portland to London Heathrow Airport round-trip?

    According to our current data, Icelandair ($604), Iberia ($605), and Air Canada ($608) offers the cheapest pricing from Portland to London Heathrow Airport. Icelandair is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Portland to London Heathrow Airport one-way?

    One-way options have recently been found by users for as low as $397 on Icelandair. Other airlines that offer cheap prices include WestJet from $415 and British Airways from $429 one-way.

  • What are the most reliable airlines from Portland to London Heathrow Airport?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Portland to London Heathrow Airport on time: American Airlines (74%), Alaska Airlines (74%), Aer Lingus (74%).

  • What are the cheapest flights from Portland to London Heathrow Airport?

    On average you can expect to pay $2,111 for a flight from Portland to London Heathrow Airport. The cheapest flight overall is $448 while the most popular route, (Portland - London Heathrow) is currently priced at $598.

  • Where are the most common layover locations when flying from Portland to London Heathrow Airport?

    The most popular layover on flights from Portland to London Heathrow Airport is Seattle.

  • What are some popular things to do or see while on a layover in Seattle?

    Most Seattle visitors opt to spend their time experiencing Pike Place Market, Space Needle, and Seattle Waterfront. Pike Place Market, Space Needle, and Seattle Waterfront are located about 11.2 mi, 12.0 mi, and 10.9 mi, respectively from Seattle/Tacoma Intl. Travelers can book a car rental at Seattle/Tacoma Intl for about $45 per day to make their sightseeing more efficient.

  • Where are the least popular layover locations for Portland to London Heathrow Airport flights?

    Portland to London Heathrow Airport flights that have layovers will least frequently stop in Reykjavik.

  • Can I find deals for flights from Portland to Heathrow that include hotel bookings?

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

  • How can I find direct flights from Portland to Heathrow?

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

  • Can I find deals for business class flights from Portland to Heathrow?

    Yes. Cheapflights offers flight deals from Portland to Heathrow 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 Portland to London Heathrow Airport?

    Currently, November is the cheapest month in which you can book a flight from Portland to London Heathrow Airport (average of $661). Flying from Portland to London Heathrow Airport in June is currently the most expensive (average of $1,122). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
Hounslow
Hayes
Thornton Heath
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Gatwick
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Top 10 airlines flying from Portland to Heathrow

Discover the top 10 airlines that operate flights from Portland to Heathrow. 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 March 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$492Average$791FlexibilityNo cancel feeOn-time76%
IberiaCheapest$580Average$770FlexibilityNo cancel feeOn-time77%
DeltaCheapest$609Average$896FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$616Average$956FlexibilityNo cancel feeOn-time67%
KLMCheapest$617Average$981FlexibilityNo cancel feeOn-time75%
American AirlinesCheapest$626Average$944FlexibilityNo cancel feeOn-time71%
FinnairCheapest$629Average$796FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$631Average$866FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$633Average$940FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$645Average$866FlexibilityNo cancel feeOn-time69%
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