HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news

Cheap flights from Tulsa (TUL) to the United Kingdom from $395

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 8/26. 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.
TUL — LHR
jun. 22 — jun. 291
From?
To?
sáb. 6/22
sáb. 6/29
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

What is the cheapest month to fly from Tulsa to United Kingdom?

The best pricing can be found in the month of March. Prices to United Kingdom from Tulsa average $914. You can even find prices in March for less than $914, as users have found deals to United Kingdom from as low as $601. The month of July appears to be one of the more expensive times to travel to United Kingdom from Tulsa. Flying in the targeted month can save you up to 45%.

What is the cheapest time of day to fly from TUL to GB?

When flying from Tulsa to United Kingdom, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Cheap Tulsa to United Kingdom flights in June & July 2024

Find cheap flight options from Tulsa to United Kingdom specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 3,263,674 searches. Prices were last updated on junio 17, 2024.
Scroll through some of the best deals on flights from Tulsa to United Kingdom in 2024. More deals are always being added, so be sure to check back regularly.
mar. 7/1612:17 pmTUL - LHR
1 stop14h 48mBritish Airways
mar. 7/239:15 pmLHR - TUL
2 stops31h 17mBritish Airways
Deal found 6/16$1,019
mar. 7/96:46 pmTUL - LHR
1 stop12h 29mDelta
mar. 7/168:40 amLHR - TUL
2 stops21h 10mDelta
Deal found 6/15$1,022
mar. 7/96:46 pmTUL - LHR
1 stop12h 29mKLM
mar. 7/163:55 pmLHR - TUL
1 stop23h 14mKLM
Deal found 6/15$1,027
mar. 7/169:59 amTUL - LHR
2 stops15h 16mVirgin Atlantic
mar. 7/233:55 pmLHR - TUL
1 stop13h 55mVirgin Atlantic
Deal found 6/16$1,032
jue. 7/186:46 pmTUL - LHR
1 stop12h 29mKLM
lun. 7/293:55 pmLHR - TUL
1 stop23h 14mKLM
Deal found 6/17$1,157
vie. 7/126:00 amTUL - LHR
2 stops18h 45mDelta
sáb. 7/203:55 pmLHR - TUL
1 stop13h 55mDelta
Deal found 6/17$1,162
lun. 7/14:34 pmTUL - LHR
1 stop15h 51mBritish Airways
lun. 7/89:15 pmLHR - TUL
2 stops31h 17mBritish Airways
Deal found 6/17$1,164
lun. 7/11:05 pmTUL - LHR
2 stops14h 10mVirgin Atlantic
lun. 7/87:45 pmLHR - TUL
2 stops34h 05mVirgin Atlantic
Deal found 6/17$1,181
vie. 7/126:00 amTUL - LHR
1 stop18h 25mDelta
sáb. 7/203:55 pmLHR - TUL
1 stop13h 55mDelta
Deal found 6/17$1,198

Tulsa to United Kingdom 2024 flight deals

Discover exclusive flight deals for travel between Tulsa and United Kingdom in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 3,263,674 searches. Data last updated junio 17, 2024.
Scroll through some of the best deals on flights from Tulsa to United Kingdom in 2024. More deals are always being added, so be sure to check back regularly.
lun. 9/3010:32 amTUL - LGW
1 stop17h 28mMultiple Airlines
dom. 10/62:00 pmLGW - TUL
1 stop23h 51mMultiple Airlines
Deal found 6/16$551
mar. 9/2412:51 pmTUL - LGW
2 stops15h 09mVirgin Atlantic
mar. 10/112:00 pmLGW - TUL
2 stops17h 40mVirgin Atlantic
Deal found 6/16$720
mar. 9/2411:55 amTUL - LHR
1 stop13h 45mUnited Airlines
mar. 10/12:05 pmLHR - TUL
2 stops27h 04mUnited Airlines
Deal found 6/16$730
lun. 9/232:55 pmTUL - LHR
1 stop14h 40mUnited Airlines
mié. 10/97:25 amLHR - TUL
2 stops17h 06mUnited Airlines
Deal found 6/16$738
mar. 10/81:06 pmTUL - LHR
2 stops13h 29mAir Canada
mié. 10/236:00 pmLHR - TUL
2 stops29h 36mAir Canada
Deal found 6/17$742
mar. 9/247:30 amTUL - LHR
2 stops20h 30mUnited Airlines
jue. 10/36:50 amLHR - TUL
2 stops16h 46mUnited Airlines
Deal found 6/17$743
lun. 9/2310:49 amTUL - EDI
1 stop15h 36mUnited Airlines
vie. 10/412:30 pmEDI - TUL
2 stops28h 43mUnited Airlines
Deal found 6/16$743
mar. 9/247:30 amTUL - LHR
2 stops16h 50mUnited Airlines
jue. 10/36:50 amLHR - TUL
2 stops16h 46mUnited Airlines
Deal found 6/16$748
mié. 10/166:00 amTUL - LHR
2 stops18h 45mDelta
mié. 10/236:15 amLHR - TUL
2 stops17h 48mDelta
Deal found 6/16$750

Tulsa to United Kingdom flights leaving soon

Find last-minute flight options from Tulsa to United Kingdom 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 3,263,674 searches. Data last updated junio 17, 2024.
Have a look at some of the flights available from Tulsa to United Kingdom departing last-minute. Users should be sure to double check the price, date, and time of their last-minute flight.
lun. 6/2412:17 pmTUL - LGW
2 stops36h 48mMultiple Airlines
dom. 8/42:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,230
sáb. 6/228:15 pmTUL - LGW
2 stops28h 55mMultiple Airlines
jue. 8/12:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,233
sáb. 6/228:15 pmTUL - LGW
2 stops28h 55mMultiple Airlines
dom. 8/42:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,241
sáb. 6/228:15 pmTUL - LGW
1 stop31h 45mMultiple Airlines
jue. 8/12:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,242
sáb. 6/228:15 pmTUL - LGW
2 stops28h 55mMultiple Airlines
jue. 8/12:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,244
sáb. 6/228:15 pmTUL - LGW
1 stop31h 45mMultiple Airlines
dom. 8/42:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,251
sáb. 6/228:15 pmTUL - LGW
1 stop31h 45mMultiple Airlines
jue. 8/12:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,253
sáb. 6/228:15 pmTUL - LGW
2 stops28h 55mMultiple Airlines
jue. 7/252:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,258
lun. 6/2412:17 pmTUL - LGW
2 stops36h 48mMultiple Airlines
jue. 7/252:00 pmLGW - TUL
1 stop34h 09mMultiple Airlines
Deal found 6/16$1,262

One-way flights to United Kingdom from Tulsa

Search for one-way flight options from Tulsa to United Kingdom. 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 3,263,674 searches. Data last updated junio 17, 2024.
Take a look at some of the one-way flights we've detected from Tulsa to United Kingdom. Those needing a return flight from Tulsa to United Kingdom can use the search form above.
lun. 8/269:18 pmTUL - LHR
3 stops39h 32mMultiple Airlines
Deal found 6/15$395
lun. 8/269:18 pmTUL - LGW
2 stops40h 52mMultiple Airlines
Deal found 6/15$399
lun. 8/269:18 pmTUL - LHR
2 stops37h 07mMultiple Airlines
Deal found 6/15$405
vie. 8/169:46 pmTUL - LGW
1 stop31h 09mMultiple Airlines
Deal found 6/16$415
mar. 10/86:00 amTUL - LHR
2 stops19h 15mDelta
Deal found 6/17$428
mar. 10/810:05 amTUL - LGW
2 stops17h 55mDelta
Deal found 6/17$428
vie. 8/239:46 pmTUL - LGW
1 stop31h 09mMultiple Airlines
Deal found 6/16$451
mar. 10/87:30 amTUL - LHR
3 stops17h 00mAir Canada
Deal found 6/16$471
mar. 10/810:05 amTUL - LCY
2 stops15h 10mDelta
Deal found 6/17$478

Find flights from Tulsa to United Kingdom within your budget

Customize your flight search to find flights from Tulsa to United Kingdom 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 3,263,674 searches. Data last updated junio 17, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$551 - $817

Route

Depart

Return

Price

TulsaLondon Gatwick

TUL - LGW

TULLGW

Tulsa

lun. 9/30

1 stop17h 28m

London Gatwick

dom. 10/6

1 stop23h 51m

$551

TulsaLondon Gatwick

TUL - LGW

TULLGW

Tulsa

mar. 9/24

2 stops15h 09m

London Gatwick

mar. 10/1

2 stops17h 40m

$720

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mar. 9/24

1 stop13h 45m

London Heathrow

mar. 10/1

2 stops27h 04m

$730

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mar. 10/8

2 stops13h 29m

London Heathrow

mié. 10/23

2 stops29h 36m

$742

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mié. 10/16

2 stops18h 45m

London Heathrow

mié. 10/23

2 stops17h 48m

$750

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mar. 9/24

1 stop12h 24m

London Heathrow

jue. 10/3

1 stop15h 45m

$752

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mar. 9/3

1 stop17h 52m

London Heathrow

mié. 9/11

2 stops15h 59m

$787

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

dom. 8/11

1 stop11h 39m

London Heathrow

jue. 11/7

2 stops18h 10m

$799

TulsaLondon Heathrow

TUL - LHR

TULLHR

Tulsa

mar. 8/13

1 stop11h 39m

London Heathrow

mar. 10/22

1 stop13h 12m

$817

Flights are sorted by cheapest first

Deals found on 6/16

No data available for this route at this time. Please check back soon.

Best time to book a flight from Tulsa to United Kingdom

Have a flexible travel schedule? Discover the best time to fly to United Kingdom from Tulsa 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.

Reviews of airlines servicing United Kingdom

Get insights into the airlines that provide service to United Kingdom. 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 United Kingdom. Reviews last updated junio 17, 2024.
See what other customers who have flown with Delta, KLM and Air France from Tulsa to United Kingdom have to say. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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.

Delta
8.0
Very good
10,000 reviews
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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.

KLM
7.9
Good
1,449 reviews
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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.

Finnair
7.7
Good
1,352 reviews
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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.

Virgin Atlantic
7.6
Good
715 reviews
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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.

Air France
7.5
Good
1,680 reviews
Delta
8.0
Very good
10,000 reviews

Boarding

8.2

Food

7.4

Crew

8.6

Overall

8.0

Comfort

7.9

Entertainment

8.0

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 Tulsa to United Kingdom. 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 Tulsa to United Kingdom?

    If you book a flight to United Kingdom from Tulsa, you will be flying from Tulsa, which is the city’s only airport. Tulsa (TUL) is located 6.6 mi from the center of Tulsa.

  • Can I find flights from Tulsa to United Kingdom for under $600 on Cheapflights?

    Yes, there are multiple flights from Tulsa to United Kingdom for under $600. The cheapest flight booked recently is on Multiple Airlines for just $551, but on average you can expect to pay $756.

  • Are there last-minute flights available from Tulsa to United Kingdom for under $1,300?

    There are currently 20+ open flights from Tulsa to United Kingdom within the next 7 days for less than $1,300.

  • What are the cheapest airlines to fly from Tulsa to United Kingdom one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $428. Air Canada flights start at $471 while deals on Finnair start at $641 one-way.

  • What are the most popular routes from Tulsa to United Kingdom?

    Most travelers choose Tulsa - London Heathrow, Tulsa - Edinburgh Turnhouse or Tulsa - London City when deciding on the best route from Tulsa to United Kingdom.

  • What does TUL to LHR mean?

    TUL stands for Tulsa Airport, while LHR stands for London Heathrow Airport. These codes are often called IATA codes, a set of identifiers established by IATA (International Air Transport Association) that is widely used by airlines and the aviation industry. Manchester Airport (MAN), Edinburgh Turnhouse Airport (EDI), London Gatwick Airport (LGW), Birmingham Airport (BHX), Glasgow Intl Airport (GLA) are some additional IATA codes for airports related to your trip.

  • Can I find deals for flights from Tulsa to United Kingdom that include extra baggage allowance?

    The amount of baggage you can bring on your Tulsa to United Kingdom 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 Tulsa to United Kingdom with specific airlines?

    Yes, Cheapflights allows you to browse and filter Tulsa to United Kingdom 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 Tulsa to United Kingdom that include hotel bookings?

    Yes. In addition to deals on Tulsa to United Kingdom flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Tulsa to United Kingdom?

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

  • Can I find deals for business class flights from Tulsa to United Kingdom?

    Yes. Cheapflights offers flight deals from Tulsa to United Kingdom 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 Tulsa to United Kingdom that allow pets onboard?

    Many airlines flying from Tulsa to United Kingdom 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 Tulsa to United Kingdom?

    Yes, you can often find last-minute deals on Tulsa to United Kingdom 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 Tulsa to United Kingdom flight deals updated?

    The Tulsa to United Kingdom flight deals you see on this page were last updated on 6/17.

  • What are the most popular airlines that fly from Tulsa to United Kingdom?

    Consider American Airlines, British Airways or Delta when booking your flight. These represent the most popular airlines when flying from Tulsa to United Kingdom.

  • What is the cheapest month to book a flight from Tulsa to United Kingdom?

    Currently, November is the cheapest month in which you can book a flight from Tulsa to United Kingdom (average of $652). Flying from Tulsa to United Kingdom in June is currently the most expensive (average of $1,097). 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.

Alternative routes for Tulsa to United Kingdom
See prices for flight routes from nearby airports that may be better suited for you.

Dallas/Fort Worth to Heathrow flights
Dallas/Fort Worth to Charles de Gaulle flights
Dallas/Fort Worth to Leonardo da Vinci/Fiumicino flights
Dallas/Fort Worth to Frankfurt flights
Dallas/Fort Worth to Madrid flights
Dallas/Fort Worth to Istanbul flights
Dallas/Fort Worth to Gatwick flights
Dallas/Fort Worth to London City flights
Dallas/Fort Worth to Dublin flights
Dallas/Fort Worth to Orly flights
Dallas/Fort Worth to Athens flights
Dallas/Fort Worth to Keflavik Intl flights
Dallas/Fort Worth to Barcelona-El Prat flights
Dallas/Fort Worth to Lisbon flights
Dallas/Fort Worth to Malpensa flights
Dallas/Fort Worth to Amsterdam flights
Dallas/Fort Worth to Copenhagen flights
Dallas/Fort Worth to Linate flights
Dallas/Fort Worth to Sabiha Gokcen flights
Dallas/Fort Worth to Florence flights
Dallas/Fort Worth to Vicenza flights
Dallas/Fort Worth to Arlanda flights
Dallas/Fort Worth to Zurich flights
Dallas/Fort Worth to Munich flights
Dallas/Fort Worth to Nice flights
Dallas/Fort Worth to Helsinki flights
Dallas/Fort Worth to Oslo Gardermoen flights
Dallas/Fort Worth to Edinburgh flights
Dallas/Fort Worth to Berlin flights
Dallas/Fort Worth to Budapest flights
Dallas/Fort Worth to Vienna flights
Dallas/Fort Worth to Prague flights
Dallas/Fort Worth to Stansted flights
Dallas/Fort Worth to Bruxelles-National flights
Dallas/Fort Worth to Frederic Chopin flights
Dallas/Fort Worth to Glasgow Intl flights
Dallas/Fort Worth to Porto flights
Dallas/Fort Worth to Sofia flights
Dallas/Fort Worth to Naples flights
Dallas/Fort Worth to Duesseldorf Intl flights
Tulsa to Heathrow flights
Dallas/Fort Worth to Tirana flights
Oklahoma City to Heathrow flights
Dallas/Fort Worth to Zagreb flights
Fayetteville to Heathrow flights
Dallas/Fort Worth to Toulouse flights
Dallas/Fort Worth to Luton flights
Dallas/Fort Worth to Otopeni Intl flights
Dallas/Fort Worth to Dubrovnik flights
Dallas/Fort Worth to Alicante flights

Top 8 airlines flying from Tulsa to United Kingdom

Discover the top 8 airlines that operate flights from Tulsa to United Kingdom. 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 3,263,674 searches. Data last updated junio 17, 2024.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$590Average$953FlexibilityNo cancel feeOn-time70%
DeltaCheapest$624Average$978FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$658Average$893FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$660Average$1,026FlexibilityNo cancel feeOn-time69%
IberiaCheapest$668Average$741FlexibilityNo cancel feeOn-time77%
Virgin AtlanticCheapest$705Average$1,033FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$707Average$853FlexibilityNo cancel feeOn-time76%
KLMCheapest$733Average$824FlexibilityNo cancel feeOn-time75%
Boston to Austin flights
Detroit to Hawaii flights
Miami to New York flights
USA to Bali flights
Seattle to Vancouver flights
Miami to Mexico City flights
Denver to Los Angeles flights
San Jose to San Diego flights
USA to Zurich flights
New York to Miami flights
Fort Lauderdale to Orlando flights
Tulsa to England flights

Search flights from Tulsa to United Kingdom by cabin class

Find flights from Tulsa to United Kingdom, based on your preferred cabin class, be it economy, premium economy, business, or first class.
First Class
Business Class
Prem Econ Class
Economy Class

Book a flight to one of these trending destinations

User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations
Flights to Naxos
Flights to Urumqi
Flights to Kaunas
Flights to Hyannis Barnstable
Flights to Brainerd Crow Wing County
Flights to Figari-Sud Corse
Flights to Komatsu
Flights to Riverton
Flights to Hakodate
Flights to Trabzon
Flights to Surigao
Flights to Pellston Emmet County
Flights to Constanţa Mihail Kogalniceanu
Flights to Neiva La Marguita
Flights to Liberal
Flights to Virac
Flights to Devils Lake
Flights to Edremit/Korfez
Flights to Alghero-Fertilia
Flights to Gaziantep
Flights to Paleochori Milos
Flights to Rhinelander Oneida County
Flights to Nampula
Flights to Leh
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.
View all available airlines