Try using the gravity belt and the turbo booster.
With the gravity belt equipped its safest to fly about 3/4ths up the screen.
The gravity belt helps with your reaction time: you'll be able to drop below high zappers pretty quickly.
Then get back up to the 3/4ths level as soon as you are able.
At that height you can jetpack above any mid-level zappers.
The turbo booster is useful because you're invulernable every time you hit a boost.
Alternately you could try using the de-zapinator, but I didn't find it too helpful since it is unreliable.
It really just comes down to having split-second reaction times.
gaming.stackexchange.com/users/36756/Wallace Brown
I use the Lucky Last, Freeze-o-matic, Final Blast and a Revive.
Definitely keep 3/4th of the way up and try to collect tokens.
I didn't use the final blast until I reached at least 4500.
After using the blast I use a revive.
The Lucky Last is so you have a better chance of getting a free revive or blast.
Freeze-o-matic is there to get you some extra distance when you die.
It took me a bit but it worked.
gaming.stackexchange.com/users/37476/redndahead
The turbo boost is nice but unreliable, I recommend the Gravity Belt and the Air Barrys.
Remember that frustrating moment where you couldn't possibly have risen high enough to dodge that Zapper?
Air Barrys make your initial jump almost instant and give you very high mobility up and down.
You can't always stay in the middle of the screen and I find the Air Barrys more consistently help compared to the Turbo Boost.
In addition, if you have the coins, a well timed Revive (heart) or bomb can be just what you need to get a few hundred more meters.
Save them up
(I always had a few because I was required to buy them for challenges) until you have a good opportunity.
gaming.stackexchange.com/users/11920/Ben Brocka
Yes, the Turbo Boost and Gravity belt worked for me.
Staying 3/4ths up on the screen is the best spot as Wallace said.
It is additionally helpful because the vehicle tokens generally spawn around there and any vehicle will give you an extra hit before death.
The vehicles have a bonus of slowing you down, with the exception of the hog.
In addition to turbo boost/gravity belt, I also had the big blast and second chance utilities.
If you get hit, use the big blast
and then when that is coming to an end, use the second chance.
gaming.stackexchange.com/users/37153/B. Groves
Obviously collecting lots of tokens on your way helps
but i found the best way was to buy a pack of super head starts and a quick revive.
I used ezy-dodge missiles and freeze-o-matic to make for a safer run and an extended finish.
Try to stay in vehicles for as long as possible too!
gaming.stackexchange.com/users/73927/user73927
just like they said, 3/4 of the screen is crucial.
Once I got to 4,498 (my current high-score) with Lucky-last and Gift-token.
By the time you get to the 4,000's, it's practically luck, so with a bomb or a double-life, you should be able to top my high by two meters (
gaming.stackexchange.com/users/48256/Goodwin Lu
Try equipping Free Ride and Turbo Boost.
If you're good with the vehicles, you should get a good start.
I did that once and got a score of 8,030m.
gaming.stackexchange.com/users/80351/OscarFJ912
Air Barry - To quickly get you up...
Gravity Belt - To quickly get you down...
Try and maintain Barry at 3/4th level.
Also focus only on collecting Tokens as they will provide Quick revives and Blasts!!Do not focus on collecting coins, they will often land you into troubles!!
I read this article, used this combo and completed the achievement in the first time!!
gaming.stackexchange.com/users/91896/Vaibhav
What are some strategies for completing the Romeo, Alpha, Delta (Fly over 5KM) achievement in Jetpack Joyride?  Looking for specific gadget combinations, utilities used, jetpacks and/or attire equipped (if they make a difference), and general strategy.
Strategy for achieving Romeo, Alpha, Delta (Fly over 5KM)?
gaming.stackexchange.com
<jetpack-joyride>
gaming.stackexchange.com/questions/93109
gaming.stackexchange.com/users/26796/Joe Masilotti
Try using; the gravity belt, the turbo booster, Lucky Last, Freeze-o-matic, Final Blast and Air Barrys. While there are few items that can be used to help in order to achieve flying over 5km, the turbo booster seems to be the most common one used.
Users suggesting power ups that can be used.