How can I do a "broad" search for flights? is pretty broad, but not broad enough.

Rome2Rio.com (example) says I can go from FSM to MAD for $340 US but refuses to tell me date or airline.

matrix.itasoftware.com says that if I can tolerate 150+ ground miles at either end, the cheapest thing in the next six months is $1761.

skyscanner.net offers tons of options, then gives me an empty calendar on which I must pick a single day.

Most sites demand you at least know the week and won't define "nearby."

I said FSM to MAD only because that's what Rome2Rio said was cheapest. I have plenty of time and can easily use many other airports. Maybe Rome2Rio is lying—it always says that ITA is cheating me.


Here are a few search engines that do seem to offer the options you are looking for (all of them have been mentioned on this site before):

  • Momondo requires you to pick a date but then displays a graph with prices for a whole month.
  • Adioso offers several ways to flexibly specify dates and also accepts a whole country or region as destination.
  • Kayak's explore functionality is very flexible both in time and in space.

In fact, ITA's matrix also has most of what you require: flexible date picker, ability to specify multiple airports one-by-one, etc. Compared to Adioso, you still need to do some work by varying the length of stay or the airports but that's almost as flexible as it gets, especially if you want to have fine-grained control in defining what's “nearby”.

Now, it seems you are not happy about the results but that's something else. Pricing is much more difficult than simply finding a connection. Each search engine has to use some tricks and none can be guaranteed to find the absolute cheapest fare. Broadening the search parameters also means that the search space will become larger so that it's even more difficult for a search engine to consider all combinations. Perhaps counterintuitively, finding a good fare could therefore become less likely with a broader search.

At the same time, once you have seen a low price your expectations are “anchored” and you feel disappointed not to be able to book it. But it's entirely possible that this cheap fare did not really exist in the first place. Assuming that the cheapest fare is the real one and other sites are “cheating” you is just wishful thinking. There is simply no way to know for sure (that's also the reason why the sites mentioned by @skv exist).

In my experience, online travel agents and ITA always display higher fares than meta-search engines but the latter don't have to make good on their promises and merely redirect you to another site where you might discover that the connection is not bookable or much more expensive than it seemed. If anything, I would assume that ITA's matrix results are the most reliable and I would take other estimates with a grain of salt.

Importantly, Rome2rio is a bit different from other search engines. It combines many transportation modes and also include low-cost carrier that are not indexed by online travel agent and regular booking systems. It will also show you price estimates without selecting a date and despite all this it is blazingly fast compared to ITA Matrix, Adioso or Momondo.

Quite clearly, Rome2rio is not querying airline or distribution systems to find actual fares, instead relying on past data or heuristics to get a rough idea of the price. It's great to explore the possibilities but until you actually land on the booking page, you can't trust its estimates (there is even a form to give feedback about them so the makers of the site are fully aware that it's a work in progress). The best ways to find fare you can rely on are still search engines like ITA Matrix and Adioso, even if you don't like their results.

  • Good point about Rome2Rio supporting LCCs, while ITA and others don't.
    – Mark Mayo
    Dec 3 '14 at 7:37
  • Kayak's Explorer appears to not include very many airports; perhaps I misinterpreted a poor UI. Adioso's flexible schedule pages include a disclaimer that they do not serve complete results. Momondo's best was higher than ITA.
    – WGroleau
    Dec 3 '14 at 20:15
  • @WGroleau Isn't that exactly what you should expect based on my answer?
    – Relaxed
    Dec 3 '14 at 21:06
  • "possible that the cheap fare did not really exist"—hence the original question for a way to decide that's the case in minutes instead of hours.
    – WGroleau
    Dec 18 '14 at 20:31
  • @WGroleau Your questions ask for tools offering broad searches and that's what I covered in my answer. It seems you hoped that such a broad search would also make it easier to find out if a given fare exists but it simply isn't so. It's a trade-off. If you want a broader search, you are more likely to miss some flights (disclaimer or no disclaimer; Adioso is simply upfront about it) or see fares that don't really exist. But if you want to avoid disappointments, then you need to use tools like ITA's matrix, not a tool with broader search parameters.
    – Relaxed
    Dec 19 '14 at 0:02

I thought about this long and hard, while this question is for a specific destination, the question per se is "What's a better way to find flights when cost is important and schedule is not".

I do not want to point at one specific website, but I think as a concept the answer could be http://flightfox.com/ or https://www.darjeelin.com/ they do charge a minor fee, but then you get experts to work for you.

They can "stitch" even over the land connections and also make sensible recommendations as humans. I used to be on their "experts" panel for some time and I can vouch for the level of usefulness of the concept also others have voiced similar opinions here too.

Not sure if you already knew this and have any constraints in using them though

  • 1
    Valid suggestion, I'd forgotten about suggesting those two, which is ironic given I have a link for one of them in my profile. +1.
    – Mark Mayo
    Dec 3 '14 at 11:17
  • If you see the previous edit I had it as part of my answer, but thought you may be hurt that I refer people to your profile and then removed it :)
    – skv
    Dec 3 '14 at 11:29
  • Haha, hadn't spotted that. All good :)
    – Mark Mayo
    Dec 3 '14 at 11:44
  • I will take a look at them. I am reluctant to pay, but if the savings exceed the fee... In the past, I've searched for hours, then given a travel agent the best thing I could find to see whether they could beat it. I'd just like to remove that 's' from 'hours.'
    – WGroleau
    Dec 3 '14 at 20:20
  • 1
    In fact, "routes" may have been a better word than "flights." Rome2Rio is great for possibilities to check on, but I hate it when they raise hopes of X and then hours of work can only get down to 2X.
    – WGroleau
    Dec 3 '14 at 20:29

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