Sister/brother-in-law are flying Milwaukee-McAllen by doing MKE-DFW on Midwest and DFW-MFE on American. The tickets were purchased as separate transactions on Midwest.com and AA.com.

Question: Will Midwest check a bag through to McAllen on the AA flight? Will the AA agent check a bag through at McAllen all the way to MKE?

I've flown with interline connections between Midwest and other airlines several times, but I avoid checking a bag if humanly possible anytime I'm doing something out of the ordinary.

I know that Midwest and American have an interline agreement, so I'm sure it is technically possible. But....

(a) Will the agents in MKE and MFE actually check the bag through, or will it be a hassle?

(b) Will the Midwest agent in MKE, or the AA agent in MFE, be able to see the connecting flight beyond Dallas on the other airline? Remember that these were not booked together.

(c) Will just showing the connecting intinerary be enough information?

They have about 2.5 hours both directions at DFW so there should be plenty of time to retrieve the bag at the carousel and check in again if necessary. But hopefully that's not necessary.

Anybody have real experience with this? Once when I was flying PDX-LAS-MKE interline (and as normal, not checking a bag) I asked the Alaska agent in Portland if she'd in theory be able to check my small bag through to MKE on Midwest. She said no, and acted as if I'd handed her three sugar cubes and asked her to turn them into a road map of Quebec. Might have just been a clueless agent? But my sister and brother-in-law are relatively infrequent travelers, and I'd like to be confident in instructing them for just such a case.