Upvote:3
Consider:
- Weather en route is not a significant factor, the aircraft can simple fly around it, even major Hurricanes.
- What matters to you and the airline is weather conditions at the origin or destination airport. If the predicted conditions would allow the aircraft to takeoff or land, the flight will go.
- For predictable weather conditions, airlines will typically allow, or even encourage fee-free changes days in advance. For example, American opened their change window for Florida on Tuesday, 5 days ahead of Irma.
- In conditions such as in the current Caribbean, flights would not be delayed, they would be cancelled ahead of time.
If the airline cancels the flight and offers you a refund, take that option. If they cancel but the ticket is still non refundable and you decide not to go at all, then use your insurance.
Source: Experience, many times. Downvotes without comment are just unhelpful.