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Is there a way to find out how much it would have cost to buy a particular airplane ticket at some point in the past?

For example, how could I find out how much it would have cost to buy a one-way itinerary from airport A to airport B on October 1, 2011 for travel on November 1, 2011?

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Remember that the price for the same seat on a future flight can and does change daily or even hourly depending on several factors. So there is not one fixed price on one day. –  Peter Hahndorf Jan 23 '12 at 13:17
    
There could be challenges in showing such data, even in case it were available. As Kate demonstrates in her excellent answer in another question, prices fluctuate depending on when a ticket is booked and it isn't necessarily just an increase in price as it gets closer to flight date as sometimes bookings can fall into other fare classes. –  Ankur Banerjee Jan 23 '12 at 13:17
    
I don't know if any airlines operate this policy, but at the Swedish railways, even people looking at particular tickets without buying anything will affect the price. If any airlines have the same policy, then there is no such thing as the price on 1 October 2011. –  gerrit Jan 9 '13 at 15:01
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1 Answer 1

Since deregulation in 1978 US airlines have been free to charge whatever they want, and they almost universally responded with a plethora of extraordinarily complicated fare rules and an almost infinite number of fare options designed to maximize their revenue in a highly competitive marketplace. As a result literally every time you search for an airfare you get a different number.

Before 1978, US airfares were approved by regulators and published, both in the airline's own timetables and in consolidated publications like the Official Airline Guide (OAG).

It might be possible to research an old airfare by finding old timetables or copies of the OAG, which are sporatically available online. For example according to this old American Airlines timetable from February 10, 1930, the fare from Chicago to Peoria was $6.71.

The Bing flight search engine stores historical fare information which it will display for you when you search for a flight. After you search for a particular city pair you'll see a link marked "Details & fare history" which, sometimes, shows you some historical data for airfares on that route. When this is available, it will give you approximate information as to whether the current fare offered on that route is historically high or low.

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