When you fly on budget airlines, cheaper is always better.
After all, it's not as if you get food, fantastic service or your own TV screen, so why pay a cent more than you have to? Luckily, most budget flights are short enough that this doesn't become too painful.
However, budget airline flights fluctuate in price much more wildly than regular airline prices do, and if you're not careful you might end up paying even more than you would for a non-budget ticket.
That's like paying Prada prices for a wallet from 77th Street. Here's how not to.
1. Sign up for the airlines' newsletters
Budget airlines are constantly having sales. No kidding.
They're like that shop that's been displaying a "closing down sale" notice in the window for the last 5 years.
I get at least one or two notifications a week.
Some of these sales last only a day or two, so unless you obsessively check the websites the only way to know is to sign up for the newsletters.
If you're planning a trip in a few weeks or months, sign up for all the budget airlines' newsletters and then watch their sales notifications until you find a sale that covers the dates you want to travel on.
In my experience, unless you're trying to book a last minute ticket or travelling over a public holiday or the school holiday period, you can almost always find a sale ticket.
2. Know the booking fees each airlines charges
Unfortunately, comparing the prices charged by the various budget airlines isn't as straightforward as it sounds.
The booking or administrative fees charged by each airline can be as much as a whopping $20 and you don't get to see this additional cost until you're prompted to enter your credit card details, so don't forget to take that into account when you compare prices.
Despite the rebates you can earn by using certain credit cards, it is often sadly cheaper to just pay by SingPost if the option is available to you.
Tiger Airways - $18 credit card booking fee or $5 AXS booking fee for a return ticket
Jetstar - $16 credit card booking fee for return ticket, payment via 7-11 and SingPost is free
Air Asia - $16 credit card booking fee or $4 direct debit processing fee for return ticket
Scoot - $18 to $20 credit/debit card processing fee