But when it comes to long-haul international journeys, the differences between business class and first class become much more pronounced. To start, first class cabins aren't available on all ...

Should you splurge on an upgrade to international first class or business class? This comprehensive guide will help you decide based on your travel needs.

Long-haul business class United Airlines Polaris business class. This is where the boundary between first and business class starts to get a little blurrier.