Originally Posted by
The Situation
Or it could be less...one of my summer trips is cheaper as two one-way tickets. Most frequently, it will be the same total price though.
It really depends on the market. Out of DTW, the number of routes on DL with Sat night stay RT fares (where a roundtrip will be less than two one-ways) far exceeds routes without. Most of them have advance purchase requirements, so if you are booking close-in, you will likely just get one-way fares and price will be same as two one-way tickets. But further out, there will be price differences (and no, two one-way's will no be cheaper than the RT fares).
No Sat night stay RT fares
DEN
SEA
DFW
ORD
MDW
BWI
Sat night stay RT fares
LAX
SFO
PDX
IAH
MCI
BNA
STL
MSY
BOS
RDU
PIT
JFK
LGA
EWR
PHL
FLL
MIA
TPA
MCO
ATL
CLT
IAD
AUS
DCA