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Cheapest overallModerate complexity

STL to MIA

$23 less in cash. More moving parts. Southwest outbound + Frontier return.

STL6:35 AM
5h 15m · Separate one-ways
MIA12:50 PM
2 tickets No through-check 3h 05m buffer
Sep 16–20 · 4 nightsVerified Jul 15, 2026 · 9:02 AM CT
Why this is cheaper

The savings have a source.

01

Two separately priced one-way fares beat the round-trip filing.

02

The return uses a low-cost carrier with bags priced separately.

03

A longer buffer lowers—but does not remove—self-transfer exposure.

True trip cost

Every dollar we could identify.

Arithmetic checked
Combined fares & taxes
$196
Checked-bag fees
$89
Seat selectionRandom assignment
Included
Expected disruption costShown only in risk-adjusted total
$27
True trip totalPer traveler · protection excluded
$285
Risk-adjusted trip cost$312
Trip-risk advisor

What could go wrong—and who protects you.

01

The tickets are unrelated; one carrier does not have to protect the other.

02

Baggage is not through-checked between separate tickets.

03

Risk-adjusted total adds $27 based on a demo $180 missed-connection exposure.

Separate-ticket protection is limited.
Two separate sets of nonrefundable rules apply.

Ticket map

Every ticket and transfer, separated clearly.

WNSTL FLL

WN 318 · 6:35 AM–10:15 AM · 2h 40m

GroundFLL MIA

Transfer · 10:35 AM–12:05 PM · 1h 30m