What actually makes a good traveler gift for your dad?
Think in terms of fit, not price first. compact organizers, comfort upgrades, durable travel essentials and items that earn their place in limited luggage space can work at several budgets, but compatibility with their habits matters more. Check how they travel, how light they pack, the length of their usual trips and the annoyances they repeatedly mention; keep the activities he chooses when nobody is assigning him a task in view; and avoid bulky travel accessories that are more photogenic than useful. The strongest choice should feel obvious to them once they see why you picked it.
The strongest gift ideas usually come from the person’s real habits: what they already use, what they talk about and what would make an existing interest better.