Route notes
Why this routing works
This routing uses a straightforward west-to-east sequence from Denver to London, then onward to Frankfurt and Riyadh before returning to Denver. For a four-week trip, that ordering keeps the transatlantic portion at the front of the itinerary and limits backtracking across Europe.
Because this is built as a multi-stop itinerary rather than separate one-way tickets, the route is structured around fixed city pairs in a clear progression: Denver-London, London-Frankfurt, Frankfurt-Riyadh, and Riyadh-Denver. That can make it easier to manage a short series of international stops within a defined four-week window.
With a November departure in economy class, this itinerary fits travelers who want a compact multi-city plan spanning Europe and the Middle East without adding extra stop points. The overall price range of $13,892 to $18,186 reflects the full routing as provided.
Timing-wise, four weeks gives enough room to space out three international stopovers while still keeping the trip on a single continuous ticketed path back to Denver. The return from Riyadh closes the loop cleanly without revisiting earlier stops.