Find flights
When to book
Airlines
FAQs

Cheap flights from Washington, D.C. Reagan-National Airport to London from £191

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 16/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
DCA — LON
18 Jun — 25 Jun1
1 adult
Tue 18/6
Tue 25/6

The best prices from Washington, D.C. Reagan-National to London are usually found in October or November, booked 59 days in advance, depart on a Saturday or Friday and return on a Monday

Cheap flight deals from Reagan-National to London

Discover tips and strategies to find the most affordable flight options for your journey from Reagan-National (DCA) to London (LON). 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 13 June 2024.

Popular in

June

Cheapest in

October

Average price

£935

Round-trip from

£68
High demand for flights, 36% potential price rise
Best time to find cheap flights, 18% potential price drop
Average for round-trip flights in June 2024
From Washington, D.C. Reagan-National to London (LON)

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

Users have found that flying from Washington, D.C. Reagan-National Airport to London on a Wednesday typically leans towards higher prices. However, this doesn’t mean you still can’t find a deal. Flexibility with other aspects of your flight can still land a great price for your trip.

How far in advance should I book a flight from Washington, D.C. Reagan-National Airport to London?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 24 days in advance, which can save you up to 18% on flights from Washington, D.C. Reagan-National Airport to London compared to booking the week you need them. Waiting 24 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at £575. For sooner than that we have options available in the next 3 days from £629.

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

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, October can be a great choice for travel to London. Flights to London from Washington, D.C. Reagan-National Airport in October are about £563 on average during October, but can be found for as low as £269.

What is the cheapest time of day to fly from DCA to LON?

One of the essential ways to save on airfare from Washington, D.C. Reagan-National Airport to London is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at midday could potentially save you up to 8% on airfare.

Cheap Finnair flights from Reagan-National to London

Explore cheap flight options specifically provided by Finnair for the route between Reagan-National and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 1,007,911 searches. Data last updated 13 June 2024.
Peruse some of the lowest-priced Finnair flights we've found from Washington, D.C. to London. Deals update often to give you more flight options matching your criteria
Wed 18/919:45DCA - LHR
1 stop9h 45mFinnair
Tue 24/915:15LHR - DCA
1 stop12h 48mFinnair
Deal found 12/6£505
Thu 26/917:00DCA - LHR
1 stop9h 40mFinnair
Wed 2/1017:00LHR - DCA
1 stop11h 03mFinnair
Deal found 12/6£510
Wed 4/919:45DCA - LHR
1 stop9h 45mFinnair
Sun 8/917:00LHR - DCA
1 stop11h 03mFinnair
Deal found 12/6£544
Sun 23/619:30DCA - LHR
1 stop10h 20mFinnair
Tue 14/116:20LHR - DCA
1 stop12h 09mFinnair
Deal found 13/6£838
Sat 22/619:00DCA - LHR
1 stop10h 50mFinnair
Tue 14/116:20LHR - DCA
1 stop12h 09mFinnair
Deal found 13/6£892

Cheap American Airlines flights from Reagan-National to London

Explore cheap flight options specifically provided by American Airlines for the route between Reagan-National and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 1,007,911 searches. Data last updated 13 June 2024.
Some of the best deals we've found on American Airlines flights travelling from Washington, D.C. to London. Ensure the flight price, dates, time, and airline match your criteria before you book.
Wed 2/1017:00DCA - LGW
1 stop10h 10mAmerican Airlines
Wed 30/1015:00LGW - DCA
1 stop12h 32mAmerican Airlines
Deal found 12/6£444
Wed 2/1017:00DCA - LGW
1 stop10h 10mAmerican Airlines
Wed 30/1015:00LGW - DCA
1 stop12h 32mAmerican Airlines
Deal found 13/6£445
Tue 20/817:45DCA - LGW
1 stop9h 25mAmerican Airlines
Thu 5/915:05LGW - DCA
1 stop12h 58mAmerican Airlines
Deal found 12/6£477
Tue 27/817:45DCA - LGW
1 stop9h 25mAmerican Airlines
Tue 10/915:05LGW - DCA
1 stop12h 58mAmerican Airlines
Deal found 12/6£477
Wed 18/910:14DCA - LGW
2 stops15h 21mAmerican Airlines
Wed 25/915:05LGW - DCA
1 stop12h 58mAmerican Airlines
Deal found 12/6£480
Mon 2/917:45DCA - LGW
1 stop9h 25mAmerican Airlines
Tue 10/915:05LGW - DCA
1 stop12h 58mAmerican Airlines
Deal found 13/6£488
Wed 14/817:45DCA - LGW
1 stop9h 25mAmerican Airlines
Tue 27/815:05LGW - DCA
1 stop12h 56mAmerican Airlines
Deal found 12/6£496
Wed 14/817:45DCA - LGW
1 stop9h 25mAmerican Airlines
Thu 22/815:05LGW - DCA
1 stop12h 56mAmerican Airlines
Deal found 12/6£521
Fri 15/1117:45DCA - LGW
1 stop9h 20mAmerican Airlines
Sat 23/1115:00LGW - DCA
1 stop13h 32mAmerican Airlines
Deal found 13/6£522

Cheap Reagan-National to London flights in June & July 2024

Find cheap flight options from Reagan-National to London specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 1,007,911 searches. Prices were last updated on 13 June 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Mon 29/715:30DCA - LGW
1 stop11h 00mJetBlue
Tue 27/812:10LGW - DCA
1 stop11h 36mJetBlue
Deal found 12/6£482
Mon 22/714:00DCA - LHR
1 stop11h 30mJetBlue
Thu 29/808:25LHR - DCA
1 stop12h 20mJetBlue
Deal found 12/6£499
Mon 22/713:05DCA - LHR
1 stop12h 25mJetBlue
Thu 29/808:25LHR - DCA
1 stop11h 20mJetBlue
Deal found 13/6£499
Sun 28/716:55DCA - LHR
1 stop12h 05mAir Canada
Tue 27/809:30LHR - DCA
1 stop11h 29mAir Canada
Deal found 12/6£509
Wed 10/711:30DCA - LGW
1 stop14h 05mJetBlue
Sun 1/912:10LGW - DCA
1 stop11h 36mJetBlue
Deal found 13/6£510
Mon 22/716:55DCA - LHR
1 stop12h 05mAir Canada
Thu 29/812:05LHR - DCA
2 stops14h 44mAir Canada
Deal found 12/6£513
Sun 28/717:30DCA - LGW
1 stop9h 40mAmerican Airlines
Sat 7/915:05LGW - DCA
1 stop12h 58mAmerican Airlines
Deal found 12/6£519
Thu 25/714:00DCA - LGW
1 stop12h 05mJetBlue
Tue 27/812:10LGW - DCA
1 stop12h 49mJetBlue
Deal found 12/6£521
Tue 23/716:55DCA - LHR
1 stop12h 05mAir Canada
Fri 20/909:30LHR - DCA
1 stop11h 29mAir Canada
Deal found 12/6£525

Reagan-National to London 2024 flight deals

Discover exclusive flight deals for travel between Reagan-National and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 1,007,911 searches. Data last updated 13 June 2024.
These are some of the best deals we've found on flights to London in 2024 at this time. For more flight deals, be sure to check back very soon.
Sun 22/906:00DCA - LHR
1 stop19h 30mAir Canada
Mon 30/909:30LHR - DCA
1 stop17h 19mAir Canada
Deal found 11/6£429
Sun 22/916:55DCA - LHR
1 stop12h 05mAir Canada
Mon 30/912:05LHR - DCA
2 stops14h 44mAir Canada
Deal found 11/6£434
Wed 2/1012:00DCA - LGW
1 stop17h 00mKLM
Tue 8/1012:00LGW - DCA
1 stop14h 16mKLM
Deal found 13/6£443
Wed 2/1017:00DCA - LGW
1 stop10h 10mAmerican Airlines
Wed 30/1015:00LGW - DCA
1 stop12h 32mAmerican Airlines
Deal found 12/6£444
Wed 9/1011:00DCA - LHR
1 stop14h 30mAir Canada
Tue 15/1009:30LHR - DCA
1 stop17h 19mAir Canada
Deal found 11/6£445
Wed 2/1017:00DCA - LGW
1 stop10h 10mAmerican Airlines
Wed 30/1015:00LGW - DCA
1 stop12h 32mAmerican Airlines
Deal found 13/6£445
Wed 2/1010:10DCA - LGW
2 stops18h 50mDelta
Tue 8/1012:00LGW - DCA
1 stop14h 16mDelta
Deal found 12/6£446
Wed 11/916:00DCA - LGW
1 stop13h 00mVirgin Atlantic
Fri 20/912:00LGW - DCA
1 stop13h 41mVirgin Atlantic
Deal found 11/6£447
Mon 25/1116:20DCA - LHR
1 stop9h 50mAir Canada
Mon 2/1214:30LHR - DCA
1 stop12h 15mAir Canada
Deal found 12/6£448

Reagan-National to London flights leaving soon

Find last-minute flight options from Reagan-National to London for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 1,007,911 searches. Data last updated 13 June 2024.
Book one of these great deals on flights from Washington, D.C. to London. It's wise to confirm all flight details are correct before booking.
Sun 23/613:05DCA - LHR
1 stop12h 25mJetBlue
Wed 6/1108:25LHR - DCA
1 stop15h 34mJetBlue
Deal found 13/6£647
Tue 18/612:01DCA - LCY
2 stops17h 04mMultiple Airlines
Tue 25/616:50LCY - DCA
2 stops29h 30mMultiple Airlines
Deal found 13/6£653
Thu 20/612:01DCA - LCY
2 stops17h 04mMultiple Airlines
Mon 24/616:50LCY - DCA
2 stops29h 30mMultiple Airlines
Deal found 12/6£654
Sun 23/608:30DCA - LHR
1 stop17h 00mJetBlue
Tue 17/1207:25LHR - DCA
1 stop12h 07mJetBlue
Deal found 11/6£659
Fri 21/612:01DCA - LCY
2 stops17h 04mMultiple Airlines
Sun 23/617:00LCY - DCA
2 stops29h 20mMultiple Airlines
Deal found 13/6£683
Sun 23/613:05DCA - LHR
1 stop12h 25mJetBlue
Sun 10/1108:25LHR - DCA
1 stop17h 34mJetBlue
Deal found 13/6£686
Sun 23/613:05DCA - LHR
1 stop12h 25mJetBlue
Sat 9/1107:25LHR - DCA
1 stop12h 07mJetBlue
Deal found 13/6£698
Thu 20/608:30DCA - LGW
1 stop17h 35mJetBlue
Thu 4/712:10LGW - DCA
1 stop11h 49mJetBlue
Deal found 12/6£701
Wed 19/615:30DCA - LGW
1 stop10h 05mJetBlue
Wed 26/612:10LGW - DCA
1 stop13h 48mJetBlue
Deal found 12/6£711

One-way flights to London from Reagan-National

Search for one-way flight options from Reagan-National to London. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 1,007,911 searches. Data last updated 13 June 2024.
If you're seeking multiple options on one-way flights from Washington, D.C. to London, be sure to check out these deals, which are updated often. Those seeking round-trip flights from Washington, D.C. to London should utilise the search form at the top of the page.
Tue 16/714:00DCA - LGW
1 stop18h 30mMultiple Airlines
Deal found 12/6£191
Tue 16/714:00DCA - LGW
1 stop18h 30mMultiple Airlines
Deal found 12/6£192
Wed 17/712:00DCA - LGW
1 stop13h 20mMultiple Airlines
Deal found 12/6£219
Thu 18/713:00DCA - LGW
1 stop19h 30mMultiple Airlines
Deal found 12/6£225
Thu 18/713:00DCA - LGW
1 stop19h 30mMultiple Airlines
Deal found 12/6£225
Sat 13/718:59DCA - LGW
2 stops34h 01mMultiple Airlines
Deal found 13/6£245
Tue 17/919:45DCA - LTN
2 stops21h 30mMultiple Airlines
Deal found 13/6£246
Sat 13/718:59DCA - LGW
2 stops34h 01mMultiple Airlines
Deal found 13/6£246
Tue 17/919:45DCA - LGW
2 stops17h 05mMultiple Airlines
Deal found 13/6£249

Find flights from Reagan-National to London within your budget

Customise your flight search to find flights from Reagan-National to London 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 1,007,911 searches. Data last updated 13 June 2024.

Fly from

Any airport

Fly to

Any airport

Budget

£429 - £470

Route

Depart

Return

Price

Washington, D.C. Reagan-NationalLondon Heathrow

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 22/9

1 stop19h 30m

London Heathrow

Mon 30/9

1 stop17h 19m

£429

Washington, D.C. Reagan-NationalLondon Gatwick

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 2/10

1 stop17h 00m

London Gatwick

Tue 8/10

1 stop14h 16m

£443

Washington, D.C. Reagan-NationalLondon Gatwick

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 2/10

1 stop10h 10m

London Gatwick

Wed 30/10

1 stop12h 32m

£444

Washington, D.C. Reagan-NationalLondon Gatwick

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 2/10

2 stops18h 50m

London Gatwick

Tue 8/10

1 stop14h 16m

£446

Washington, D.C. Reagan-NationalLondon Gatwick

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 11/9

1 stop13h 00m

London Gatwick

Fri 20/9

1 stop13h 41m

£447

Washington, D.C. Reagan-NationalLondon Heathrow

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Mon 18/11

2 stops13h 15m

London Heathrow

Wed 27/11

2 stops15h 35m

£449

Washington, D.C. Reagan-NationalLondon Heathrow

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Tue 1/10

1 stop11h 10m

London Heathrow

Mon 7/10

2 stops27h 34m

£452

Washington, D.C. Reagan-NationalLondon Heathrow

DCA - LHR

DCALHR

Washington, D.C. Reagan-National

Sun 17/11

1 stop9h 55m

London Heathrow

Wed 27/11

1 stop12h 15m

£463

Washington, D.C. Reagan-NationalLondon Gatwick

DCA - LGW

DCALGW

Washington, D.C. Reagan-National

Wed 7/8

1 stop11h 05m

London Gatwick

Wed 4/9

1 stop13h 36m

£470

Flights are sorted by cheapest first

Deals found on 11/6

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

Use this chart to determine the optimal time to book a return flight from Reagan-National to London. Price data was last updated on 31 May 2024.
The price you pay for your flight from Washington, D.C. Reagan-National Airport to London 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.
Search Deals

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

Use this chart to determine the cheapest time to fly return from Reagan-National to London. Price data was last updated on 9 June 2024.
Morning
Midday
Afternoon
Evening
All times are departure.
Travellers seeking maximum savings on their Washington, D.C. Reagan-National Airport to London flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from Reagan-National to London

Have a flexible travel schedule? Discover the best time to fly to London from Reagan-National with our price prediction graph.
Estimated return 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.

Temperature and rainfall in London by month

Plan your trip to London by taking into account the average temperature and rainfall totals by month.

LON

Temperature

4 - 17 °C

If weather is an important factor for your trip to London, 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 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. 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 London. Reviews last updated 13 June 2024.
To help decide which airline to fly from Washington, D.C. to London, see what other customers have to say about Finnair, American Airlines and Air France. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

8.0
Very Good
10,000 reviews
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

7.9
Good
1,461 reviews
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

7.7
Good
1,893 reviews
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

7.7
Good
1,360 reviews
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

7.6
Good
4,260 reviews
8.0
Very Good
10,000 reviews

Crew

8.6

Overall

8.0

Boarding

8.2

Entertainment

8.0

Comfort

7.9

Food

7.4

Reviews

1 / 10

Bad experience with the staff boarding the gate. I couldn’t board with my carry on, personal item and a funny bag. I had to put my passport inside my pockets and put the funny bag inside the personal item. Then after passing the staff pull out everything again.

Related info for your journey

Find useful and relevant information for your journey from Reagan-National to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • Can I find flights from Washington, D.C. Reagan-National Airport to London for under £500 on Cheapflights?

    Yes, there are multiple flights from Washington, D.C. Reagan-National Airport to London for under £500. The cheapest flight booked recently is on Air Canada for just £429, but on average you can expect to pay £449.

  • Are there last-minute flights available from Washington, D.C. Reagan-National Airport to London for under £700?

    There are currently 20+ open flights from Washington, D.C. Reagan-National Airport to London within the next 7 days for less than £700.

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

    Flying on Air Canada is currently your cheapest option to London, with prices starting at £429. Additional return tickets that might be worth considering are offered by KLM and American Airlines, with the lowest prices starting at £443 and £444, respectively. Air Canada is priced at 27% lower than the current average price of a flight leaving 3 months from now.

  • What are the most popular routes from Washington, D.C. Reagan-National Airport to London?

  • What does DCA to LHR mean?

    These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Washington, D.C. Reagan-National Airport to London Heathrow Airport flight would often be abbreviated as a DCA to LHR flight. Ready for more IATA code knowledge? These are related airports for your current travel destination: London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN).

  • Can I find deals for flights from Reagan-National to London that include extra baggage allowance?

    The amount of baggage you can bring on your Reagan-National to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from Reagan-National to London with specific airlines?

    Yes, Cheapflights allows you to browse and filter Reagan-National to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

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

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

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

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

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

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

  • Can I find deals for flights from Reagan-National to London that allow pets onboard?

    Many airlines flying from Reagan-National to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from Reagan-National to London?

    Yes, you can often find last-minute deals on Reagan-National to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the Washington, D.C. Reagan-National Airport to London flight deals updated?

    The Washington, D.C. Reagan-National Airport to London flight deals you see on this page were last updated on 13/6.

  • What is the cheapest month to book a flight from Washington, D.C. Reagan-National Airport to London?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Reagan-National Airport to London (average of £110). Flying from Washington, D.C. Reagan-National Airport to London in July is currently the most expensive (average of £163). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.