Vienna to Frankfurt flights, non-stop

The way back

1. M
2. T
3. W
4. T
5. F
6. S
7. S
8. Nov16–no fare seen
9. 17€10320:50
10. 18€10521:40
11. 19€12521:40
12. 20€11621:40
13. 21€12809:20
14. 22€10710:20
15. 23–no fare seen
16. 24–no fare seen
17. 25€10521:40
18. 26€11821:40
19. 27€10521:40
20. 28–no fare seen
21. 29€8909:00
22. 30–no fare seen
23. Dec1–no fare seen
24. 2–no fare seen
25. 3€10420:10
26. 4–no fare seen
27. 5€11914:20
28. 6–no fare seen
29. 7–no fare seen
30. 8€10109:00
31. 9–no fare seen
32. 10–no fare seen
33. 11€8420:10
34. 12€9409:00
35. 13–no fare seen
36. 14€9309:00
37. 15€9320:10
38. 16–no fare seen
39. 17–no fare seen
40. 18€11221:40
41. 19–no fare seen
42. 20–no fare seen
43. 21–no fare seen
44. 22–no fare seen
45. 23–no fare seen
46. 24€9509:00
47. 25€10720:10
48. 26€9820:10
49. 27–no fare seen
50. 28€9409:00
51. 29€9420:10
52. 30€9320:10
53. 31€9609:00
54. Jan1–no fare seen
55. 2–no fare seen
56. 3–no fare seen
57. 4–no fare seen
58. 5–no fare seen
59. 6–no fare seen
60. 7–no fare seen
61. 8–no fare seen
62. 9–no fare seen
63. 10–no fare seen
64. 11–no fare seen
65. 12–no fare seen
66. 13–no fare seen
67. 14–no fare seen
68. 15–no fare seen
69. 16–no fare seen
70. 17–no fare seen
71. 18–no fare seen
72. 19–no fare seen
73. 20–no fare seen
74. 21–no fare seen
75. 22–no fare seen
76. 23–no fare seen
77. 24–no fare seen
78. 25–no fare seen
79. 26–no fare seen
80. 27–no fare seen
81. 28–no fare seen
82. 29–no fare seen
83. 30–no fare seen
84. 31–no fare seen
85. Feb1–no fare seen
86. 2–no fare seen
87. 3–no fare seen
88. 4–no fare seen
89. 5–no fare seen
90. 6–no fare seen
91. 7–no fare seen
92. 8–no fare seen
93. 9–no fare seen
94. 10–no fare seen
95. 11–no fare seen
96. 12€9509:00
97. 13€9709:00

Of the 27 days with a time, the day's cheapest flight leaves in the morning on 11, in the afternoon on 1 and in the evening on 15.

Frankfurt to Vienna non-stop: from €84 on 11 Dec, with fares on 27 of the next 90 days.