Does Delta ever upgrade on international flights?
Delta Airlines occasionally upgrades passengers on international flights, with complimentary upgrades available through paid options or based on elite status or other criteria. Delta Upgrades on International Flights are subject to availability and can be bid on closer to departure to enjoy a higher class of service.
Here are steps to upgrade Delta International flight:
Check eligibility and upgrade availability.
Choose an upgrade method: miles, cash, or certificates.
Request an upgrade online, at check-in, or at the Airport.
Monitor your request.
If upgraded, get a new boarding pass.
If you need any further information you can contact Delta Airlines customer service directly.
Read more:- https://www.airlinesgrouptravel.com/blog/how-to-upgrade-on-delta