not an irrelevant question in my view. While many companies will try to tell you that they are not "flash" and want to "do things differently" or "it is against our ethos to waste many on expensive travel arrangements, which can be invested into other areas", if the policy is anything less than the standard (roughly 5/6 hours plus business class), this tells you that the company is either tight fisted or not very profitable. Either way, you should be concerned. Also, as others point out, you may spend a lot of time travelling and it is important that you do so in reasonable comfort. The first couple of times you travel, it is all a bit exciting. After a while you become more demanding. Also, for longer term career development and/market intelligence etc, it is great to fly business class as you have more chance of sitting next to an influential person...