[02/28/2019 @ 3:11 PM] AA matches Prague, Copenhagen, and Oslo. DL fares gone. Athens and Budapest was not matched.
KLM and Air France have round-trip flights from Houston (IAH/HOU) to Athens, Prague, Budapest, Copenhagen or Oslo (ATH/PRG/BUD/CPH/OSL) starting at $485 with a connection. Flights in March, October, November, December, and January. Flight may operate as a Delta/SkyTeam code-share.
Note: Carry-on bag is allowed for free, but a checked bag will cost about +$60 each-way. Upgrades into “Regular Economy” are available for +$50 more each-way.
Note: Be sure to check both “IAH” and “HOU” for availability.