Originally Posted by
MarkOK
A two legged one way trip is split via mileage when it comes to EQD. SFO-JFK is 2586 miles. JFK-DCA is 213 miles. If the EQD was $500 for the one way trip, the SFO-JFK would be given ~462 EQD (2586/(213+2586)*500) while the JFK-DCA leg would be given 38 EQD. There is no way mathematically that you could be owed 20% for what was 4% of the trip's length, even if the to/fro fares were in different classes.
It's a roundtrip. Of course it's possible with differing fare classes.
Your friend's Hawaii anecdote isn't relevant because it didn't involve a cancellation or delay. Elective flight changes generally require repricing the whole trip; missed flights due to delay or cancellation are refunded via a totally different calculus.