When my wife got her visa I booked a flight online for her with KLM @ www.klm.com/ph and I had to book a return flight because when you change the online enquiry form from return to one way, they only offered business class at about £1,500 whereas the return economy price was about £580 (2006 prices).

The good thing about booking online for her is that once you given her the booking code, she can go online and print off her e-ticket and she can even check in online before she leaves for the airport.
Cheers,
Iain.