How can I view all of the flights between two cities across all dates?
I believe that the standard routes of carriers between two semi-major US cities always maintain the same route number (e.g. UA3271), and day of the week. I'm looking at planning travel for an interview, so dates are [currently] quite flexible (as in at least one month's range). Since that's the case, there are other constraints that go into my choice of flights. One would be the option to fly out of my home city, land in the interview location, conduct the interview, and fly out in the same day. I figure: if I can view the schedule for flights (i.e. routes) between the two cities, I can make an educated request for days of travel. Yes, I could likely work with the interview scheduler (and I will), but I'd like to be proactive in suggesting some dates to achieve my goal, as well as learn this skill for myself in the future. Thus:
Where can I view the daily routes and times for flights between two cities, on whatever rotating basis (e.g. day of the week) they may be on?
Best Answer
One way to do this is to find the published timetable for your airline. For example, I did this recently and used the Qantas Timetable for flight planning. The PDF version (link at left) was most helpful, as it shows all the flights on a weekly basis in a very compact form.
Following your UA example, the United Timetable is a web search but I don't see a PDF version. The Delta flight schedules can be downloaded as a PDF.
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Answer 2
This is one of the things Expertflyer will do for you.
Answer 3
ITA Matrix can do this -- it can do everything else so why not this? Unclick the "
Only show flights and prices with available seats" checkbox and you will get a list of flights: 
Answer 4
If there are nonstop flights available between your hometown and the interview location, you can also try so search for the flight schedule of the airport. To give some examples of German airports:
- Stuttgart airport has a pretty good online search, allowing you to search connections without specifying a date: http://www.stuttgart-airport.com/arrival-departure/flightplan
- Munich airport has a PDF of the entire schedule available (https://www.munich-airport.de/_b/0000000000000001689285bb58ee1e46/Flugplan-Sommer-2017---Druckversion.pdf)
- Frankfurt airport also allows to search for flights without specifying a date, however, the results are listed separately for each day, not in the compact form used by Stuttgart airport (https://www.frankfurt-airport.com/en/flights---more/flights.html)
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