Flight change: How to find cheapest return flight in time frame?
I have a United flight CDG-RTB-CDG. Now I already used CDG-RTB, and I want to change the date of RTB-CDG, which my fare allows without fee with price difference only.
The problem is that it's a pain to find an alternative flight. For each day that I want to look up prices, I have to enter it manually, then wait for quite a while for results to come up, then click the sort-by-prices button in the list.
Is there another way to search for prices of return flights, maybe getting a table overview?
Easiest is actually to call Unitd and let them do the work. From experience agents can quickly find cheap alternatives. I wish I had their tools available.
What I'm doing right now:
Change dates in the URL with the results. That allows me to quickly change dates, but I still have to wait ages for results and then click the sort-by-price button.
Check one-way flights RTB-CDG on Google Flights. The cheapest ones there may be the ones I should consider as alternative return flights, but I'm not sure about that logic. And of course the flights on Google Flights are cached, so not necessarily accurate.
Update: When I called yesterday, the agent actually told me that she also has to look for flights one-by-one. So that was not much help, although I'm pretty sure that the agent that I called a few weeks ago did have an overview, because she could quickly tell me that the lowest price differences are on April 30 and May 8 at 151€. So, in the end I just used the interface by United, despite it taking several minutes to get each result. Now there was an option even cheaper than 151€ on April 30. I found a flight for 30€ that transits through Frankfurt (may hop off there).
Best Answer
I would try the following:
- Find the fare class for your flight. It’s the first letter of the fare code.
- Go on experflyer.com (no affiliation). The service requires a subscription, but there’s a 5-day free trial, no credit card required.
- Go to flight availabilities, enter RTB-CDG, April 23rd, +/- 3 days, UA, fare class, show all dates in one screen.
- You’ll get a list of flights for that fare class for a full week. Availability is shown as a letter (the fare class) and a digit (the number of available seats in that bucket, or 9 if there are more than 9). You want those which are not 0 (or possibly a higher number if you are several people travelling).
- Things are a bit complex in your case because of the multiple connections, but UA actually return the same availability for all flights on the itinerary, so you can quickly scan through the results.
- To switch to the next week, click on “refine search” and add 7 days (or use the calendar) and search again.
- If you don’t find anything in that fare class, you’ll have to try other fare classes. You can leave the class field empty to get all classes, they are arranged more or less in decreasing price order (though it’s really more complex than that). You can also select a subset of classes to make things more readable and quick to scan.
For instance in today’s routing via IAH and ORD there’s availability down to K class, while tomorrow’s only goes down to W (which is 4 buckets higher than K). On Friday one routing is fully booked while the other only has availability down to V (one notch above W).
Once you’ve found something interesting, check on the UA site.
Fare rules are complex enough that this is not guaranteed to get you the best price, but it should be a step in the right direction. Hopefully!
Note for instance that your original fare could include restrictions such as a minimum or maximum stay, having to stay over a week-end, travelling only on certain days of the week, black-out periods, and more.
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Answer 2
You can presort with a tool like ITA Matrix https://matrix.itasoftware.com/search
Search for "one way", "calendar of lowest fares" and United as the airline (routing code "UA+").
If there are any dates that look better than others, you can start with these. For May this does not look promising:
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