Limit your risk of DVT on that next long-haul flight

Font Size:

Nancy is about to fly non-stop from Perth to London and is concerned that because she is 63, she may develop deep-vein thrombosis issues. Physiotherapist Jason Lee offers advice.

I am heading to London next week on a Qantas Dreamliner flight. I’m flying from Melbourne to Perth, which is about four-and-a-half hours, then the Perth-to-London 17-hour marathon. I have poor circulation and have had a lot of treatment for varicose veins over the years. Apart from that, I am fairly fit for my age (63). Should I be concerned about a 17-hour flight? I know they say to walk around, but it’s actually not that easy when you fly economy. And is there something I can do either before or after the flight to reduce the risk of deep vein thrombosis (DVT)?

A: While DVTs are commonly associated with long-haul flights, they are actually associated with any period of time where we can’t get up and move about regularly. 

A DVT is a serious condition that occurs when a blood clot – a clump of blood that’s in a gelatinous, solid state – forms in a vein deep inside your body.

A clot commonly occurs in the thigh or lower leg behind the knee, but can develop anywhere in the body, including in the lungs. If your legs ache when you’re resting, or you notice swelling or redness in a leg or there is local tenderness, a clot may be developing.

DVTs are most common in the legs. Why? Whenever leg muscles contract, they help to pump blood back to the heart against gravity. A blood clot can develop as a result of reduced blood flow through the veins. 

Risk factors include:

  • previous history of DVT
  • family history of DVT
  • smoking
  • recent injury or surgery
  • heart disease
  • hormone therapy.

If you are at risk or are concerned, you should speak to your medical professional. A GP can organise an ultrasound to check the state of your veins. 

It’s important for a clot to be identified early, because it can break up and circulate through the blood stream resulting in a potentially fatal pulmonary embolism. 

How can you reduce the risk of a DVT?

  • Wear compression/flight stockings. These can help stop swelling in your ankles and feet and should improve the blood returning to the body from the lower legs. You can buy these items from medical and surgical supply shops and, for maximum benefit, they should be individually fitted
  • Move regularly. Try to walk up the aisle every hour or so when it’s safe and appropriate to do so. Even standing in front of your seat is advised
  • Do simple in-flight exercises such as ankle pumps and ankle circles at regular intervals. Aim for three to four minutes every hour
  • Drink plenty of water to keep fluid levels up
  • Limit your alcohol intake as that can cause dehydration and increase drowsiness and immobility
  • Be careful with sleeping tablets as they also lessen your likelihood of moving about
  • Try to keep as much space in front of you as possible, i.e. don’t load up the pocket with thick books, laptop and so on. This will give you as much space as possible to more freely move your legs and feet 
  • Recline where possible
  • When you’re in transit (at Perth airport), move about as much as possible.

Qantas spokesman Stephen Moynihan said the Perth-to-London flight was not much longer than their flight from Dallas Fort Worth to Sydney.

“We have a lot of experience in relation to long-haul travel,” he said. “In the Qantas Magazine there is a dedicated section on in-flight health including exercises. There are also tips for passengers on what to wear and things to do such as limiting alcohol intake. The exercises are also available through the in-flight entertainment system.”

Are you concerned about health risks on long flights? Do you wear compression stockings or socks?

Jason Lee is a Melbourne physiotherapist. He is happy to answer any questions you may have. Send an email to [email protected].

Disclaimer: This article contains general information about health issues and is not advice. For health advice, consult your medical practitioner or health professional.

Join YourLifeChoices today
and get this free eBook!

By joining YourLifeChoices you consent that you have read and agree to our Terms & Conditions and Privacy Policy


The disgusting things people do when they travel

For some reason, good hygiene practices often go on holiday when you do.

Bizarre requests travellers make to embassies

The ridiculous requests some Australians make to our embassies overseas.

Written by Jason Lee


Total Comments: 7
  1. 0

    Fellow-worker had a fall on his pushbike, bruised leg apparently. Went on a long o/s flight and died from a blood clot formed in leg, I understand. So it can happen.

    • 0

      So true pedro. I fell off a stool and gave my leg a really good whack but no blood and no broken bones so thought I was OK. Mentioned to the doctor 6 weeks later when I was investigating something else. Was sent for an ultrasound which showed a blood clot which needed blood thinner medication and the necessity to wear support stockings all the way up the thigh. Moral of the story – always best to investigate. Unfortunately another post here mentions the problem of trying to put on tight fitting support stockings. I feel this is one of the major reasons people won’t wear them and needs to be addressed somehow. Also the inconvenience and expense of going to a medical accessories shop to have them properly fitted. Unfortunately the alternative if you get DVT, especially on your way over to a foreign country (not so bad if you are coming back to your own country) is worse.

  2. 0

    It’d be nice just to be able to get compression stockings on in the first place!

    Did a 24 hour flight with a stopover in Hong Kong in 2013. Had no problems with my legs. Just a little bit of jetlag for about 4 hours.

    If you want plenty of room, try flying business class. You usually have your own space and a lie flat bed. I understand that most cannot afford it, but it’s worth every cent that’s spent 🙂

    Kept up the H2O and frequent walks around the cabin.

  3. 0

    With up to 9 seats across in economy and between 240 and 310 passengers in total depending on model of the plane and fitout, good luck walking about every hour!

  4. 0

    I would suggest no alcohol or high fat and sugary foods, eat simple and light and mainly plant based foods. Drinking a lot of water is not going to help much except keep you moving by going to the toilet a lot.

  5. 0

    Flew London to Perth last year. I coughed up for prem economy as I am long in the leg and also have VV and circulation issues. Did all of the above, walked drank water, worse stocking. Pharmacist also gave me a low dose aspirin to take a few weeks before and after. It was fine.



continue reading

Health news

Doctors call for convicted child killer Kathleen Folbigg's release

A group of 90 expert scientists and doctors is calling for convicted child killer Kathleen Folbigg to be pardoned in...


Adorable celebrity pets

Just like the rest of us, Hollywood's A-listers are pretty obsessed with their pets, especially when it comes to sharing...

Health news

Who needs a colonoscopy most? Ensuring those at risk head the queue

Professor Jon Emery Mary was 55 when she started having on and off tummy pains, and noticed she needed to...

Health & Ageing

What stress does to your skin, hair and nails

Stress can be an all-consuming beast. Not only does it overwhelm your brain, but it can have a physical impact,...


Multi-generational family living grows, forcing design changes

The trend towards multi-generational living, accelerated by the COVID-19 pandemic, is producing fresh approaches to Australian housing. Urban designer Craig...

Seniors Finance

Your retirement 'pay cheque'

Nothing beats the reassurance of knowing there's money coming in each month. Then retirement happens and, suddenly, it's up to...

Health news

Scientists closer to developing a vaccine for urinary tract infections

Anyone who has ever developed a urinary tract infection (UTI) knows that it can be painful, pesky and persistent, but...


Alarming spike in elder abuse during pandemic

A frightening rise in elder abuse during the pandemic is being reported across Australia. And some of the perpetrators are...