This would be entirely route dependent. Everything else being equal and assuming the flight has availability in all booking classes, AP requirements can vary significantly. For example, on a random date I chose, 1 June, here are the fares for YVR-YYZ"
Code:
YVR-YTO CXR-AC WED 01JUN16 CAD
AC YVRYTO 01JUN16
V FARE BASIS BK FARE TRAVEL-TICKET AP MINMAX RTG
1 K14M9TGC K X 204.00 R28JN T16FE 14/1 -/ - 100
2 K14S9TGC K X 224.00 R28JN T16FE 14/1 -/ - 100
3 A10M9TGC A X 235.00 R28JN T16FE 10/1 -/ - 100
4 L18UTGC L X 235.00 R15JN T11FE 18/1 -/ - 100
5 A10S9TGC A X 255.00 R28JN T16FE 10/1 -/ - 100
6 L18STGC L X 255.00 R15JN T11FE 18/1 -/ - 100
7 T14WTGC T X 270.00 ---- 14/1 -/ - 100
8 T14STGC T X 300.00 ---- 14/1 -/ - 100
9 S14WTGC S X 311.00 ---- 14/1 -/ - 100
10 S14STGC S X 341.00 ---- 14/1 -/ - 100
11 S10WTGC S X 358.00 ---- 10/1 -/ - 100‡
12 S10STGC S X 388.00 ---- 10/1 -/ - 100‡
13 G10WTPC G X 412.00 ---- 10/1 -/ - 100
14 S5WTGC S X 412.00 ---- 5/1 -/ - 100
15 G10STPC G X 442.00 ---- 10/1 -/ - 100
16 S5STGC S X 442.00 ---- 5/1 -/ - 100
17 W5WTPC W X 443.00 ---- 5/1 -/ - 100
18 W5STPC W X 473.00 ---- 5/1 -/ - 100
19 V0UTPC V X 474.00 ---- -/‡ -/ - 100
20 V0ZTPC V X 504.00 ---- -/‡ -/ - 100
21 Q0STPC Q X 545.00 ---- -/‡ -/ - 100
22 H0STPC H X 627.00 ---- -/‡ -/ - 100
23 U0STPC U X 721.00 ---- -/‡ -/ - 100
24 M0STPC M X 921.00 ---- -/‡ -/ - 100
25 B7SLTC B X 1071.00 ---- 7/1 -/ - 100
26 B3SLTC B X 1096.00 ---- 3/1 -/ - 100
27 B0SLTC B X 1121.00 ---- -/‡ -/ - 100
28 P14ZEXC P‡X 1385.00 ---- 14/1 -/ - 100
29 Y0SLTC Y X 1493.00 ---- -/‡ -/ - 100
30 P7ZEXC P‡X 1550.00 ---- 7/1 -/ - 100‡
31 Z7ZEXC Z‡X 1775.00 ---- 7/1 -/ - 100‡
32 D7ZEXC D‡X 2384.00 ---- 7/1 -/ - 100
33 D3ZEXC D‡X 2566.00 ---- 3/1 -/ - 100
34 D0ZEXC D‡X 2670.00 ---- -/‡ -/ - 100
35 C0ZEXC C‡X 3091.00 ---- -/‡ -/ - 100
36 J0ZEXC J‡X 3392.00 ---- -/‡ -/ - 100
37 Y Y X 3492.00 ---- - -/ - 1
38 J J‡X 4972.00 ---- - -/ - 1
Flex G has a 10 day AP, Flex W has 5 day AP, then everything else is 0 day.
However, contrast this to a heavy leisure route like YYZ-CUN, everything Tango and Flex has a 0 day AP:
Code:
YTO-CUN CXR-AC WED 01JUN16 CAD
AC YTOCUN.WH 01JUN16 MPM
V FARE BASIS BK FARE TRAVEL-TICKET AP MINMAX RTG
1 L0NCQ L X 144.00 T16FE -/‡ -/ - WH01
2 L0YCQ L X 164.00 T16FE -/‡ -/ - WH01
3 T0NCQ T X 168.00 T16FE -/‡ -/ - WH01
4 T0YCQ T X 188.00 T16FE -/‡ -/ - WH01
5 S0FC S X 197.00 ---- -/‡ -/ - WH01
6 S0YC S X 217.00 ---- -/‡ -/ - WH01
7 G0FC G X 230.00 ---- -/‡ -/ - WH01
8 G0YC G X 250.00 ---- -/‡ -/ - WH01
9 W0FC W X 269.00 ---- -/‡ -/ - WH01
10 W0YC W X 289.00 ---- -/‡ -/ - WH01‡
11 V0FC V X 315.00 ---- -/‡ -/ - WH01‡
12 V0YC V X 335.00 ---- -/‡ -/ - WH01
13 Q0FC Q X 369.00 ---- -/‡ -/ - WH01
14 Q0YC Q X 409.00 ---- -/‡ -/ - WH01
15 H0YC H X 432.00 ---- -/‡ -/ - WH01
16 U0YC U X 489.00 ---- -/‡ -/ - WH01
17 M0YC M X 505.00 ---- -/‡ -/ - WH01
18 P60FEX P X 560.00 ---- 60/3 -/ - WH01
19 P60YEX P X 580.00 ---- 60/3 -/ - WH01
20 B3YC B X 591.00 ---- 3/‡ -/ - WH01
21 B0YC B X 641.00 ---- -/‡ -/ - WH01
22 P21FEX P X 660.00 ---- 21/3 -/ - WH01
23 P21YEX P X 680.00 ---- 21/3 -/ - WH01
24 P14FEX P X 710.00 ---- 14/3 -/ - WH01
25 Z21FEX Z X 710.00 ---- 21/3 -/ - WH01
26 P14YEX P X 730.00 ---- 14/3 -/ - WH01
27 Z21YEX Z X 730.00 ---- 21/3 -/ - WH01
28 D21FEX D X 760.00 ---- 21/3 -/ - WH01
29 D21YEX D X 780.00 ---- 21/3 -/ - WH01‡
30 Y0YC Y X 785.00 ---- -/‡ -/ - WH01‡
31 Z14FEX Z X 810.00 ---- 14/3 -/ - WH01
32 Z14YEX Z X 830.00 ---- 14/3 -/ - WH01
33 D3FEX D X 910.00 ---- 3/‡ -/ - WH01
34 D3YEX D X 930.00 ---- 3/‡ -/ - WH01
35 C0FEX C X 1453.00 ---- -/‡ -/ - WH01
36 C0YEX C X 1473.00 ---- -/‡ -/ - WH01
37 J0FEX J X 1585.00 ---- -/‡ -/ - WH01
38 J0YEX J X 1605.00 ---- -/‡ -/ - WH01
And then look at another route, say YYZ-SFO:
Code:
YTO-SFO CXR-AC WED 01JUN16 CAD
THE FOLLOWING CARRIERS ALSO PUBLISH FARES YTO-SFO:
AA AS CO DL NW UA US VX WS
//SEE FQHELP FOR INFORMATION ABOUT THE NEW FARE DISPLAYS//
ALL FEES/TAXES/SVC CHARGES INCLUDED WHEN ITINERARY PRICED
SURCHARGE FOR PAPER TICKET MAY BE ADDED WHEN ITIN PRICED
AC YTOSFO 01JUN16
V FARE BASIS BK FARE TRAVEL-TICKET AP MINMAX RTG
1 L21S9TG L X 163.00 R28JN T16FE 21/1 -/ - 254
2 L30AS1TG L X 163.00 R15JN T11FE 30/1 -/ - 254
3 T30S1TG T X 183.00 R15JN T11FE 30/1 -/ - 254
4 T21X1TG T X 199.00 R15JN T11FE 21/1 -/ - 254
5 T21S1TG T X 219.00 R15JN T11FE 21/1 -/ - 254
6 S14N2TG S X 229.00 R15JN T11FE 14/1 -/ - 254
7 S14S2TG S X 249.00 R15JN T11FE 14/1 -/ - 254
8 G14N3TP G X 284.00 R15JN T11FE 14/1 -/ - 254
9 G14S3TP G X 302.00 R15JN T11FE 14/1 -/ - 254
10 W10N4TP W X 336.00 R15JN T11FE 10/1 -/ - 254
11 V10S4TP V X 350.00 R15JN T11FE 10/1 -/ - 254‡
12 V30Q7TP V X 375.00 ---- 30/1 -/ - 253‡
13 Q30Q8TP Q X 421.00 ---- 30/1 -/ - 253
14 Q21Q8TP Q X 466.00 ---- 21/1 -/ - 253
15 H14Q9TP H X 512.00 ---- 14/1 -/ - 253
16 H10Q9TP H X 625.00 ---- 10/1 -/ - 253
17 U10Q1TP U X 726.00 ---- 10/1 -/ - 253
18 U7Q1TP U X 840.00 ---- 7/1 -/ - 253
19 U3Q1TP U X 1095.00 ---- 3/1 -/ - 253
20 M3Q2TP M X 1475.00 ---- 3/1 -/ - 253
21 ¤P10S4TP P‡X 1500.00 R15JN T11FE 10/1 -/ - 254
22 ¤P30Q7TP P‡X 1525.00 ---- 30/1 -/ - 253
23 M0Q2TP M X 1555.00 ---- -/‡ -/ - 253
24 ¤P30Q8TP P‡X 1571.00 ---- 30/1 -/ - 253
25 ¤P21Q8TP P‡X 1616.00 ---- 21/1 -/ - 253
26 ¤Z14Q9TP Z‡X 1662.00 ---- 14/1 -/ - 253
27 B3LT B X 1739.00 ---- 3/1 -/ - 253
28 ¤Z10Q9TP Z‡X 1775.00 ---- 10/1 -/ - 253
29 ¤Z10Q1TP Z‡X 1876.00 ---- 10/1 -/ - 253
30 P30EX P‡X 1971.00 ---- 30/1 -/ - 253‡
31 ¤Z7Q1TP Z‡X 1990.00 ---- 7/1 -/ - 253‡
32 Z30EX Z‡X 2193.00 ---- 30/1 -/ - 253
33 P21EX P‡X 2243.00 ---- 21/1 -/ - 253
34 ¤Z3Q1TP Z‡X 2245.00 ---- 3/1 -/ - 253
35 BLT B X 2609.00 ---- -/‡ -/ - 253
36 ¤Z3Q2TP Z‡X 2625.00 ---- 3/1 -/ - 253
37 Z14EX Z‡X 2686.00 ---- 14/1 -/ - 253
38 ¤Z0Q2TP Z‡X 2705.00 ---- -/‡ -/ - 253
39 ¤Z3LT Z‡X 2889.00 ---- 3/1 -/ - 253
40 D7EX D‡X 2916.00 ---- 7/1 -/ - 253
41 D3EX D‡X 3050.00 ---- 3/1 -/ - 253
42 YLT Y X 3454.00 ---- -/‡ -/ - 253
43 ¤ZLT Z‡X 3759.00 ---- -/‡ -/ - 253
44 C7EX C‡X 3970.00 ---- 7/1 -/ - 253
45 C3EX C‡X 4086.00 ---- 3/1 -/ - 253
46 C0EX C‡X 4201.00 ---- -/‡ -/ - 253
47 JEX J‡X 4523.00 ---- -/‡ -/ - 253
48 Y Y X 6275.00 ---- - -/ - 1
49 J J‡X 7259.00 ---- - -/ - 1‡
On this route there are currently Flex fares with 14 and 10 day AP (which expire today), but then go back to 30 days as the lowest, counting down to 21, 14, 10, 7, 3, and 0. There are also a lot of business class fares that are derived from economy fares so also follow the same AP rules.